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A160707 Convolution square root of the Robbins sequence, A005130, starting with offset 1. 3
1, 1, 3, 18, 192, 3472, 104964, 5606272 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Self-convolution = the Robbins sequence, A005130: (1, 2, 7, 42, 429, 7436,...).

Example: A005130(4) = 42 = (1, 1, 3, 18) dot (18, 3, 1, 1) = (18 + 3 + 3 + 18).

The reversed procedure given (1, 2, 7, 42,...) for a(4) = 18 =

(1/2 * (42 - 2*a(3)) = 1/2 * 36 = 18.

CROSSREFS

Cf. A005130, A160708

Sequence in context: A258659 A002824 A259336 * A277355 A135077 A157538

Adjacent sequences:  A160704 A160705 A160706 * A160708 A160709 A160710

KEYWORD

nonn

AUTHOR

Gary W. Adamson, May 24 2009

STATUS

approved

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Last modified November 19 02:51 EST 2018. Contains 317332 sequences. (Running on oeis4.)