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A030065 a(4n)=n, a(4n+2)=a(4n)+a(4n+4), a(2n+1)=a(2n)+a(2n+2). 0
0, 1, 1, 2, 1, 4, 3, 5, 2, 7, 5, 8, 3, 10, 7, 11, 4, 13, 9, 14, 5, 16, 11, 17, 6, 19, 13, 20, 7, 22, 15, 23, 8, 25, 17, 26, 9, 28, 19, 29, 10, 31, 21, 32, 11, 34, 23, 35, 12, 37, 25, 38, 13, 40, 27, 41, 14, 43, 29, 44, 15, 46, 31, 47, 16, 49, 33, 50, 17, 52, 35, 53, 18, 55, 37, 56, 19, 58 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..77.

FORMULA

a(n)=2a(n-4)-a(n-8).

CROSSREFS

Sequence in context: A141210 A244373 A107640 * A328676 A269595 A055176

Adjacent sequences:  A030062 A030063 A030064 * A030066 A030067 A030068

KEYWORD

nonn,easy

AUTHOR

J. Carl Bellinger (carlb(AT)ctron.com)

EXTENSIONS

Shorter description and more terms from David W. Wilson.

STATUS

approved

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Last modified January 20 06:36 EST 2022. Contains 350467 sequences. (Running on oeis4.)