Number of (n+1)X4 binary arrays with every 2X2 subblock diagonal sum less antidiagonal sum equal to some horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum.
A186122
Number of (n+1)X4 binary arrays with every 2X2 subblock diagonal sum less antidiagonal sum equal to some horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum.
Terms
- a(0) =18a(1) =94a(2) =262a(3) =946a(4) =2978a(5) =10502a(6) =34678a(7) =120290a(8) =405274a(9) =1395998a(10) =4745006a(11) =16291134a(12) =55591062a(13) =190569866a(14) =651446994a(15) =2231635906a(16) =7634948674a(17) =26146587758a(18) =89488608966a(19) =306421554338
External references
- oeis: A186122