Number of (n+1)X(3+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally.
A251287
Number of (n+1)X(3+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally.
Terms
- a(0) =52a(1) =219a(2) =822a(3) =3390a(4) =12954a(5) =52474a(6) =202882a(7) =813336a(8) =3168621a(9) =12623928a(10) =49416048a(11) =196129247a(12) =770019542a(13) =3049031658a(14) =11992662293a(15) =47418860005a(16) =186721692802a(17) =737641381117
External references
- oeis: A251287