A061892 Lionel-Levine-sequence generated by (1,0,0).

0, 3, 1, 3, 3, 6, 10, 28, 108, 1011, 32511, 9314238, 84560776390, 219625370880235960

Offset

0,2

Comments

A011784 allows the addition of a(-1)=0 and a(0)=2 using row A012257(-2)=1 and A012257(-1)=0 resp. row A012257(0)=2. In this sense A011784 / A012257 are "generated" by (1,0), A061892 / A061893 by (1,0,0), A061894 / A061895 by (2,0).

Links

Table of n, a(n) for n=0..13.

Example

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

Prog

(Rexx) /* replace 1 0 0 with 1 0 to get A011784 */
S = ''; A = 1 0 0; do N = 1 to 10; T = words( A );
S = S word( A, T ); B = A; A = ''; do K = 1 to T;
A = A space( copies( K '', word( B, T + 1 - K )));
end K; end N; T = words( A ); say S word( A, T ) T;

Crossrefs

Cf. A011784, A012257, A061893, A061894.

Sequence in context: A005885 A333334 A205145 * A038573 A246591 A173465

Adjacent sequences: A061889 A061890 A061891 * A061893 A061894 A061895

Keyword

nonn,more

Author

Frank Ellermann, May 13 2001

Extensions

a(11) from Naohiro Nomoto, May 10 2002

a(12) from Michael Anthony Keyes, Apr 14 2021

a(13) from Michael Anthony Keyes, May 13 2021

Status

approved