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 A173674 a(n) = ceiling(A003269(n)/2). 0
 0, 1, 1, 1, 1, 1, 2, 2, 3, 4, 5, 7, 10, 13, 18, 25, 35, 48, 66, 91, 125, 173, 238, 329, 454, 626, 864, 1193, 1646, 2272, 3136, 4329, 5975, 8247, 11383, 15711, 21686, 29932, 41315, 57026, 78711, 108643, 149958, 206983, 285694, 394337, 544295, 751278, 1036972 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,7 LINKS Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, -1). FORMULA a(n) = A003269(n) - floor(A003269(n)/2): a(n) = ceiling(A003269(n)/2). a(n)= a(n-1) + a(n-4) + a(n-15) - a(n-16) - a(n-19). - R. J. Mathar, Sep 10 2016 MATHEMATICA b[0] = 0; b[1] = 1; b[2] = 1; b[3] = 1; b[n_] := b[n] = b[n - 1] + b[n - 4] Table[b[n] - Floor[b[n]/2], {n, 0, 30}] CROSSREFS Cf. A003269. Sequence in context: A249576 A097600 A136422 * A018128 A032189 A316077 Adjacent sequences: A173671 A173672 A173673 * A173675 A173676 A173677 KEYWORD nonn,easy AUTHOR Roger L. Bagula, Nov 25 2010 STATUS approved

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Last modified March 21 16:00 EDT 2023. Contains 361408 sequences. (Running on oeis4.)