a(n) is the number of row-convex domino towers with n bricks (rows need not be offset).
A338531
a(n) is the number of row-convex domino towers with n bricks (rows need not be offset).
Terms
- a(0) =1a(1) =4a(2) =16a(3) =61a(4) =225a(5) =815a(6) =2923a(7) =10428a(8) =37097a(9) =131776a(10) =467732a(11) =1659537a(12) =5886945a(13) =20880912a(14) =74060619a(15) =262672473a(16) =931615218a(17) =3304121816a(18) =11718561425a(19) =41561571533
External references
- oeis: A338531