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A118911 Row sums of triangle in A128973 . 1
1, 1, 3, 3, 3, 3, 5, 5, 3, 3, 9, 9, 5, 5, 11, 11, 3, 3, 9, 9, 9, 9, 15, 15, 5, 5, 15, 15, 11, 11, 21, 21, 3, 3, 9, 9, 9, 9, 15, 15, 9, 9, 27, 27, 15, 15, 33, 33, 9, 9, 27, 27, 27, 27, 45, 45, 15, 15, 45, 45, 33, 33, 63, 63, 5, 5, 15, 15, 15, 15, 25, 25, 15, 15, 45, 45, 25, 25, 55, 55, 11, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Integers in A071053 repeated .

LINKS

Table of n, a(n) for n=0..81.

FORMULA

a(2*n)=a(2*n+1) . a(n)=Sum_{k, 0<=k<=n}A128973(n,k) . a(2^k+m)=3*a(m) for 0<=m<=2^(k-1)-1, k>=1 .

a(4n)=a(2n)=A071053(n) .

CROSSREFS

Sequence in context: A262995 A125713 A162220 * A190268 A111756 A130821

Adjacent sequences:  A118908 A118909 A118910 * A118912 A118913 A118914

KEYWORD

nonn

AUTHOR

Philippe Deléham, May 02 2007, Jan 06 2008

STATUS

approved

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Last modified June 20 00:47 EDT 2019. Contains 324223 sequences. (Running on oeis4.)