
0, 1, 3, 5, 8, 10, 13, 16, 19, 23, 26, 29, 33, 36, 40, 44, 48, 52, 55, 59, 63, 68, 72, 76, 80, 84, 88, 93, 97, 102, 106, 110, 115, 119, 124, 129, 133, 138, 142, 147, 152, 156, 161, 166, 171, 176, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225
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OFFSET

1,3


COMMENTS

Additive basis of order 3: all nonnegative integers can be written as a sum of three elements from this sequence. It appears that other than 7, 12, and 25, all numbers can be written as the sum of two members of this sequence.  Charles R Greathouse IV, Apr 23 2012


LINKS

Charles R. Greathouse IV, Table of n, a(n) for n = 1..10000
Index entries for sequences that are an additive basis, order 3.


FORMULA

a(n)=floor(n*log(n)).  Enrique Pérez Herrero, Jul 29 2009


PROG

(PARI) a(n)=n*log(n)\1 \\ Charles R Greathouse IV, Apr 23 2012


CROSSREFS

See A050503 for more information.
Sequence in context: A245314 A186150 A060606 * A330038 A072150 A288575
Adjacent sequences: A050501 A050502 A050503 * A050505 A050506 A050507


KEYWORD

nonn,easy


AUTHOR

N. J. A. Sloane, Dec 27 1999


STATUS

approved

