A061894 Lionel-Levine-sequence generated by (2,0).

0, 2, 2, 4, 6, 13, 35, 171, 1934, 97151, 52942129, 1435382350480, 21191828466255176653

Offset: 0

Author

Frank Ellermann, May 13 2001

Keywords

• nonn
• easy

Examples

			a(3) = 4: (2,0),(2,2),(1,1,2,2),(1,1,2,2,3,4)
		

Crossrefs

Cf. A011784, A061892, A061895.

Extensions

a(10) from Naohiro Nomoto, May 10 2002

a(11) and a(12) from Michael Anthony Keyes, May 12 2021