A071883 A002487(n)*A002487(n+2).

0, 2, 1, 6, 2, 9, 2, 12, 3, 20, 6, 25, 6, 20, 3, 20, 4, 35, 12, 56, 15, 56, 10, 49, 10, 56, 15, 56, 12, 35, 4, 30, 5, 54, 20, 99, 28, 110, 21, 110, 24, 143, 40, 156, 35, 108, 14, 81, 14, 108, 35, 156, 40, 143, 24, 110, 21, 110, 28, 99, 20

Offset

0,2

Links

Table of n, a(n) for n=0..60.

Crossrefs

Cf. A002487, A070871.

Sequence in context: A338025 A239537 A076891 * A368241 A099304 A064680

Adjacent sequences: A071880 A071881 A071882 * A071884 A071885 A071886

Keyword

nonn

Author

N. J. A. Sloane, Jun 10 2002

Status

approved