A374794 Number of deco polyominoes of height 2n and vertical height n.

1, 1, 10, 216, 8181, 489753, 43073059, 5251140144, 847811871333, 175006259417547, 44939475107574752, 14046429669829943012, 5249989348656458769520, 2312011774544840687484876, 1184766852578716585055014620, 698927709348312453031204116720

Offset

0,3

Links

Alois P. Heinz, Table of n, a(n) for n = 0..232

Elena Barcucci, Sara Brunetti and Francesco Del Ristoro, Succession rules and deco polyominoes, Theoret. Informatics Appl., 34, 2000, 1-14.

Elena Barcucci, Alberto Del Lungo, and Renzo Pinzani, "Deco" polyominoes, permutations and random generation, Theoretical Computer Science, 159, 1996, 29-42.

Formula

a(n) = A121692(2n,n).

Crossrefs

Cf. A121692.

Sequence in context: A002967 A243476 A305107 * A294850 A259189 A326208

Adjacent sequences: A374791 A374792 A374793 * A374795 A374796 A374797

Keyword

nonn

Author

Alois P. Heinz, Jul 20 2024

Status

approved