Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically.
A254842
Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically.
Terms
- a(0) =99200a(1) =298165a(2) =638688a(3) =1308339a(4) =2423232a(5) =4446577a(6) =7695684a(7) =12905204a(8) =20980412a(9) =33267336a(10) =51310904a(11) =77549876a(12) =114597984a(13) =166682180a(14) =238409204a(15) =336506320a(16) =467845476a(17) =644609964a(18) =878393644a(19) =1187504908a(20) =1588019180a(21) =2115967840
External references
- oeis: A254842