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A025773 Expansion of 1/((1-x)(1-x^4)(1-x^7)). 0
1, 1, 1, 1, 2, 2, 2, 3, 4, 4, 4, 5, 6, 6, 7, 8, 9, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 26, 27, 28, 30, 32, 33, 34, 36, 38, 39, 41, 43, 45, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 69, 71, 73, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
COMMENTS
Partitions into parts 1, 4, and 7. - Joerg Arndt, May 01 2014
LINKS
Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 1, -1, 0, 1, -1, 0, 0, -1, 1).
FORMULA
a(n) = floor((n^2+12*n+50+14*cos(n*Pi/2))/56). - Tani Akinari, May 01 2014
a(n)= +a(n-1) +a(n-4) -a(n-5) +a(n-7) -a(n-8) -a(n-11) +a(n-12). - R. J. Mathar, Aug 21 2014
CROSSREFS
Sequence in context: A004524 A265409 A126257 * A308303 A285763 A294621
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified March 19 06:05 EDT 2024. Contains 370952 sequences. (Running on oeis4.)