4,1

This sequence appears to satisfy a(n) = 4*a(n-2) + a(n-6) - 4*a(n-8). It also appears that a(2n) = A002450(n).

Table of n, a(n) for n=4..36.

Sequence in context: A199636 A324038 A221473 * A296356 A154825 A091593

Adjacent sequences: A199635 A199636 A199637 * A199639 A199640 A199641

nonn

T. D. Noe, Nov 14 2011

approved