A155067 First differences of A031368.

3, 6, 6, 6, 8, 10, 6, 12, 8, 6, 10, 14, 6, 6, 18, 10, 12, 8, 10, 12, 12, 6, 14, 16, 6, 8, 16, 12, 8, 6, 24, 6, 18, 16, 6, 14, 12, 10, 12, 18, 12, 8, 10, 12, 6, 20, 12, 10, 14, 24, 16, 8, 16, 12, 8, 10, 14, 12, 10, 8, 16, 14, 18, 18, 12, 12, 10, 12, 24, 14, 12, 6, 24, 6, 18, 6, 24, 12, 18, 10

Offset: 1

Author

Paul Curtz, Jan 19 2009

Keywords

• nonn
• easy

Comments

All but the first term are even.

Crossrefs

Cf. A001223, A031131, A031368, A110854.

Formula

a(n)= A031368(n+1)-A031368(n).

a(n)= A001223(2n-1)+A001223(2n). - R. J. Mathar, Feb 27 2009

a(n)= A031131(2n-1). - R. J. Mathar, Feb 27 2009

Extensions

Edited and extended by R. J. Mathar, Feb 27 2009