Number of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
A251842
Number of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.
Terms
- a(0) =1443a(1) =2672a(2) =8582a(3) =18708a(4) =79817a(5) =277125a(6) =616922a(7) =2656032a(8) =9359217a(9) =20878370a(10) =90230406a(11) =320039166a(12) =713991464a(13) =3094337461a(14) =11011364659a(15) =24565215616a(16) =106623444574a(17) =380064039869a(18) =847869435282
External references
- oeis: A251842