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A172050 A008585+A029907. 1
0, 4, 8, 13, 20, 30, 46, 72, 116, 191, 320, 542, 924, 1580, 2704, 4625, 7900, 13470, 22922, 38928, 65980, 111619, 188488, 317758, 534840, 898900, 1508696, 2528917, 4233956, 7080606, 11828710, 19741272, 32916164, 54835655, 91276304 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..34.

CROSSREFS

Cf. A008585, A029907, (1-((-1)^a(n+4)))/2 = A172051.

Sequence in context: A071994 A023661 A157130 * A312219 A312220 A060403

Adjacent sequences:  A172047 A172048 A172049 * A172051 A172052 A172053

KEYWORD

nonn

AUTHOR

Mats Granvik, Jan 24 2010

STATUS

approved

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Last modified June 26 20:37 EDT 2019. Contains 324380 sequences. (Running on oeis4.)