1,1

a(n)=((A001653(4n-2)^2-1)/24

a(2)=((A001653(6)^2-1)/24=(33461^2-1)/24=46651605.

Cf. A001653, A000326.

Sequence in context: A139473 A110596 A126029 this_sequence A139474 A023929 A010113

Adjacent sequences: A107733 A107734 A107735 this_sequence A107737 A107738 A107739

nonn

Franz Vrabec (franz.vrabec(AT)aon.at), Aug 26 2006