Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order.
A227164
Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order.
Terms
- a(0) =6a(1) =66a(2) =558a(3) =4528a(4) =37012a(5) =283430a(6) =2010569a(7) =13174529a(8) =79606861a(9) =445291143a(10) =2319506105a(11) =11318251449a(12) =52022806997a(13) =226357815317a(14) =936451009248
External references
- oeis: A227164