Number of (n+2)X(6+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.
A257359
Number of (n+2)X(6+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) =174724a(1) =145924a(2) =234256a(3) =622521a(4) =1196836a(5) =2433600a(6) =6012304a(7) =15547249a(8) =31606884a(9) =64818601a(10) =152028900a(11) =378341401a(12) =795240000a(13) =1701645001a(14) =3917508100a(15) =9407060100a(16) =20173089024a(17) =44278259776a(18) =100259623044a(19) =236166840900a(20) =512492764996
External references
- oeis: A257359