Number of (n+2)X9 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly one way, and new values 0..1 introduced in row major order.
A204360
Number of (n+2)X9 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly one way, and new values 0..1 introduced in row major order.
Terms
- a(0) =75324a(1) =137407a(2) =236382a(3) =383714a(4) =901622a(5) =2225410a(6) =5145580a(7) =11331092a(8) =24907494a(9) =56952320a(10) =131317336a(11) =300971450a(12) =680102200a(13) =1545164810a(14) =3522195194a(15) =8043779858a(16) =18291387806a(17) =41624381340a(18) =94766666314a(19) =215979172968a(20) =491665678228
External references
- oeis: A204360