Number of (n+2)X(3+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
A251880
Number of (n+2)X(3+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.
Terms
- a(0) =20025a(1) =36085a(2) =94046a(3) =237142a(4) =848547a(5) =2892699a(6) =8113568a(7) =29479780a(8) =102515893a(9) =303454217a(10) =1103232945a(11) =3874324883a(12) =11951362082a(13) =43336404358a(14) =152949477561a(15) =486387698163
External references
- oeis: A251880