T(n,k) = Number of (n+2) X (k+2) 0..1 arrays with no 3 X 3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum.
A257361
T(n,k) = Number of (n+2) X (k+2) 0..1 arrays with no 3 X 3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum.
Terms
- a(0) =220a(1) =784a(2) =784a(3) =3108a(4) =2116a(5) =3108a(6) =12100a(7) =6724a(8) =6724a(9) =12100a(10) =45684a(11) =20449a(12) =17056a(13) =20449a(14) =45684a(15) =174724a(16) =53824a(17) =45796a(18) =45796a(19) =53824a(20) =174724a(21) =674856a(22) =145924a(23) =112236a(24) =101124a(25) =112236a(26) =145924a(27) =674856a(28) =2585664a(29) =451584
External references
- oeis: A257361