Number of (n+1)X(4+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.
A251215
Number of (n+1)X(4+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.
Terms
- a(0) =115a(1) =589a(2) =3089a(3) =16911a(4) =91777a(5) =502971a(6) =2746607a(7) =15040763a(8) =82261821a(9) =450304289a(10) =2463907651a(11) =13485492509a(12) =73797670811a(13) =403887709287
External references
- oeis: A251215