Number of (n+1) X (7+1) 0..2 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253494
Number of (n+1) X (7+1) 0..2 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =48293a(1) =51167a(2) =60586a(3) =82676a(4) =127898a(5) =220988a(6) =415106a(7) =827156a(8) =1722698a(9) =3728108a(10) =8381906a(11) =19618436a(12) =47878298a(13) =121758428a(14) =321599906a(15) =877526516a(16) =2458110698a(17) =7025471948a(18) =20378773106a(19) =59741111396a(20) =176432995898a(21) =523718388668
External references
- oeis: A253494