#include #include #include #include #include #include #include #include #define fo(i,a,b) for(int i=a;i<=b;i++) #define fd(i,a,b) for(int i=a;i>=b;i--) using namespace std; typedef long long LL; typedef double db; int get(){ char ch; while(ch=getchar(),(ch<'0'||ch>'9')&&ch!='-'); if (ch=='-'){ int s=0; while(ch=getchar(),ch>='0'&&ch<='9')s=s*10+ch-'0'; return -s; } int s=ch-'0'; while(ch=getchar(),ch>='0'&&ch<='9')s=s*10+ch-'0'; return s; } const int mo =1e+9+7; int js[1010]= 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482254337,718623833,763514207,66547751,953634340,351472920,308474522,494166907,634359666,172114298,865440961,364380585,921648059,965683742,260466949,117483873,962540888,237120480,620531822,193781724,213092254,107141741,602742426,793307102,756154604,236455213,362928234,14162538,753042874,778983779,25977209,49389215,698308420,859637374,49031023,713258160,737331920,923333660,804861409,83868974,682873215,217298111,883278906,176966527,954913,105359006,390019735,10430738,706334445,315103615,567473423,708233401,48160594,946149627,346966053,281329488,462880311,31503476,185438078,965785236,992656683,916291845,881482632,899946391,321900901,512634493,303338827,121000338,967284733,492741665,152233223,165393390,680128316,917041303,532702135,741626808,496442755,536841269,131384366,377329025,301196854,859917803,676511002,373451745,847645126,823495900,576368335,73146164,954958912,847549272,241289571,646654592,216046746,205951465,3258987,780882948,822439091,598245292,869544707,698611116}; LL quickmi(LL x,int tim){ LL ans=1; for(;tim;tim/=2,x=x*x%mo) if (tim&1)ans=ans*x%mo; return ans; } LL JS(int n){ int x=n/1000000; LL ans=js[x]; fo(i,x*1000000+1,n)ans=ans*i%mo; return ans; } LL NY(int n){ return quickmi(JS(n),mo-2); } int calc(int n,int m){ return JS(n)*NY(n-m)%mo*NY(m)%mo; } int main(){ for(int t=get();t;t--){ int n=get(); char ch; while(ch=getchar(),ch<'0'||ch>'9'); n--; while(ch=getchar(),ch>='0'&&ch<='1')n--; if (n%2==1)printf("0\n"); else printf("%I64d\n",1ll*calc(n,n/2)*quickmi(n/2+1,mo-2)%mo*(n+1)%mo); } return 0; }