Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order.
A227124
Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order.
Terms
- a(0) =6a(1) =40a(2) =202a(3) =1079a(4) =5820a(5) =30620a(6) =153955a(7) =732611a(8) =3296920a(9) =14061299a(10) =56985160a(11) =220076717a(12) =812449972a(13) =2875724911a(14) =9787354849a(15) =32113565709a(16) =101824379739a(17) =312674532585a(18) =931663492446
External references
- oeis: A227124