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A138016 Row sums of triangle A138015. 1
1, 2, 4, 6, 10, 14, 24, 34, 68, 102, 256, 410, 1284, 2158, 8072, 13986 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

FORMULA

Repeat each nonzero term of A003422 once, then take partial sums.

EXAMPLE

a(5) = 10 = sum of row 5 terms of triangle A138015: (1 + 2 + 4 + 2 + 1).

a(5) = 10 = (1 + 1 + 2 + 2 + 4) since A003422 starting (1, 2, 4, 10, 34, 154,...)then repeating each term = (1, 1, 2, 2, 4, 4, 10, 10,...). Take partial sums of the first 5 terms.

CROSSREFS

Cf. A003422, A138015.

Sequence in context: A077625 A027383 A280611 * A239787 A113118 A287636

Adjacent sequences:  A138013 A138014 A138015 * A138017 A138018 A138019

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Feb 28 2008

STATUS

approved

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Last modified February 17 20:29 EST 2018. Contains 299296 sequences. (Running on oeis4.)