Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally and vertically.
A257204
Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally and vertically.
Terms
- a(0) =7579a(1) =20815a(2) =49932a(3) =146246a(4) =263630a(5) =411303a(6) =729311a(7) =1137502a(8) =1610329a(9) =2274915a(10) =3169472a(11) =4338292a(12) =5813318a(13) =7747950a(14) =10182266a(15) =13271860a(16) =17219400a(17) =22080758a(18) =28263063a(19) =36156579a(20) =45961370a(21) =58304592a(22) =74030044a(23) =94195258a(24) =120080310
External references
- oeis: A257204