1,1

Proposed by R. Guy in the seqfan list, Mar 29 2009.

a(n)=15*a(n-1)-32*a(n-2)+15*a(n-3)-a(n-4). (a(n))^2 = A161159(n)*A004254(n) = A003739(n)/(5*(A001906(n))^2).

Sequence in context: A086043 A006767 A065929 this_sequence A100033 A046032 A009071

Adjacent sequences: A161492 A161493 A161494 this_sequence A161496 A161497 A161498

nonn

R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 11 2009