a(n) = Fibonacci(n)*A008653(n) for n>=1, with a(0)=1, where A008653 is the theta series of direct sum of 2 copies of hexagonal lattice.

A205967

a(n) = Fibonacci(n)*A008653(n) for n>=1, with a(0)=1, where A008653 is the theta series of direct sum of 2 copies of hexagonal lattice.

Terms

    a(0) =1a(1) =12a(2) =36a(3) =24a(4) =252a(5) =360a(6) =288a(7) =1248a(8) =3780a(9) =408a(10) =11880a(11) =12816a(12) =12096a(13) =39144a(14) =108576a(15) =43920a(16) =367164a(17) =344952a(18) =93024a(19) =1003440a(20) =3409560a(21) =1050816a(22) =7651152a(23) =8253216a(24) =8346240a(25) =27909300a(26) =61182072a(27) =2357016a(28) =213568992a(29) =185122440

External references