Number of triangular polyominoes (or polyiamonds) [A000577] with perimeter n.
A057729
Number of triangular polyominoes (or polyiamonds) [A000577] with perimeter n.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =1a(5) =4a(6) =5a(7) =16a(8) =37a(9) =120a(10) =345a(11) =1181a(12) =3844a(13) =13429a(14) =46736a(15) =167172
External references
- oeis: A057729