Number of (n+2)X(n+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.
A253502
Number of (n+2)X(n+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.
Terms
- a(0) =132a(1) =472a(2) =1332a(3) =3400a(4) =7948a(5) =17888a(6) =38564a(7) =82200a(8) =171236a(9) =356736a(10) =732740a(11) =1511840a(12) =3087196a(13) =6341584a(14) =12914820a(15) =26464792a(16) =53815684a(17) =110096960a(18) =223649540a(19) =456951728a(20) =927483412a(21) =1892890832a(22) =3839327172a(23) =7827922160a(24) =15867349668
External references
- oeis: A253502