Number of nondirected diagonally convex polyominoes with perimeter 2n + 2.
A269228
Number of nondirected diagonally convex polyominoes with perimeter 2n + 2.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =122a(5) =556a(6) =2618a(7) =12634a(8) =62128a(9) =310212a(10) =1568495a(11) =8014742a(12) =41323641a(13) =214719610a(14) =1123244757a(15) =5910863420a(16) =31268459118a(17) =166185855552a(18) =886961294034
External references
- oeis: A269228