T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
A251950
T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
Terms
- a(0) =1462a(1) =2255a(2) =2255a(3) =1933a(4) =1182a(5) =1933a(6) =2735a(7) =1251a(8) =1251a(9) =2735a(10) =4346a(11) =2053a(12) =2272a(13) =2053a(14) =4346a(15) =7115a(16) =3609a(17) =3572a(18) =3572a(19) =3609a(20) =7115a(21) =12344a(22) =7348a(23) =8756a(24) =8937a(25) =8756a(26) =7348a(27) =12344a(28) =20995a(29) =14434
External references
- oeis: A251950