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A173329 a(n) = a(n-2) + a(n-3) - floor(a(n-3)/2) - floor(a(n-6)/2). 1
1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 8, 8, 10, 10, 11, 12, 12, 14, 13, 15, 15, 16, 17, 17, 19, 19, 21, 21, 23, 24, 25, 27, 27, 30, 30, 32, 33, 34, 36, 36, 38, 38, 40, 40, 41, 42, 42, 44, 43, 45, 45, 46, 47, 47, 49, 49, 51, 51, 53, 54, 55, 57, 57, 60, 60, 62, 63 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

This sequence is interesting because in the graph of a(n+1)/a(n) there are four modes all approaching one at different rates.

LINKS

Bo Gyu Jeong, Table of n, a(n) for n = 0..2010

FORMULA

a(n+30) = a(n)+30 for n>=12.

MATHEMATICA

f[-4] = 0; f[-3] = 0; f[-2] = 0; f[-1] = 0; f[0] = 1; f[1] = 1;

f[n_] := f[n] = f[n - 2] + f[n - 3] - Floor[f[n - 3]/2] - Floor[f[n - 6]/2]

Table[f[n], {n, 0, 50}]

CROSSREFS

Sequence in context: A083479 A112231 A213856 * A241951 A084630 A325393

Adjacent sequences:  A173326 A173327 A173328 * A173330 A173331 A173332

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Nov 22 2010

EXTENSIONS

More terms from Bo Gyu Jeong, Jun 15 2012

STATUS

approved

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Last modified November 11 16:06 EST 2019. Contains 329019 sequences. (Running on oeis4.)