Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum.
A257357
Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum.
Terms
- a(0) =12100a(1) =20449a(2) =45796a(3) =101124a(4) =246016a(5) =622521a(6) =1249924a(7) =2598544a(8) =6200100a(9) =15225604a(10) =31651876a(11) =68244121a(12) =158860816a(13) =378146916a(14) =806332816a(15) =1776622500a(16) =4052850244a(17) =9490461561a(18) =20534890000a(19) =45856367881a(20) =103396974916a(21) =239629830400
External references
- oeis: A257357