
0, 0, 1, 1, 2, 4, 5, 7, 9, 12, 14, 17, 21, 24, 28, 32, 37, 41, 46, 52, 57, 63, 69, 76, 82, 89, 97, 104, 112, 120, 129, 137, 146, 156, 165, 175, 185, 196, 206, 217, 229, 240, 252, 264, 277, 289, 302, 316, 329, 343, 357, 372, 386, 401, 417, 432, 448
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OFFSET

0,5


LINKS

Table of n, a(n) for n=0..56.
Index entries for linear recurrences with constant coefficients, signature (2, 1, 0, 0, 0, 0, 1, 2, 1).


FORMULA

G.f.: x^2*(x+1)*(x^2x+1)^2/((x1)^3*(x^6+x^5+x^4+x^3+x^2+x+1)). [Colin Barker, Oct 08 2012]


PROG

(MAGMA) a056833:=func< n  Round(n^2/7) >; [ a056833(n): n in [0..70] ];


CROSSREFS

Sequence in context: A219648 A062428 A250000 * A275534 A069355 A212661
Adjacent sequences: A056830 A056831 A056832 * A056834 A056835 A056836


KEYWORD

nonn,easy


AUTHOR

N. J. A. Sloane, Sep 02 2000


STATUS

approved

