A147524 As a vector, shifts to the left when multiplied by A054521

1, 1, 1, 2, 2, 5, 3, 12, 7, 21, 12, 85, 18, 152

Offset

1,4

Comments

Given triangle A054521 modified with right border = (1, 0, 0, 0,...): (1, 1,0; 1,1,0; 1,0,1,0; 1,1,1,1,0;...). Begin with (1, 1, 1,...) then the next term = dot product of current series and rows of A054521 modified.

Eigensequence of triangle A054521.

Links

Table of n, a(n) for n=1..14.

Example

a(5) = 2 = (1, 1, 1, 2) dot (1, 0, 1, 0) = (1 + 0 + 1 + 0).

Crossrefs

Cf. A054521.

Sequence in context: A006800 A241820 A190170 * A113177 A344507 A322786

Adjacent sequences: A147521 A147522 A147523 * A147525 A147526 A147527

Keyword

nonn,uned,more

Author

Gary W. Adamson, Apr 24 2009

Status

approved