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A131508 2*A000527 (natural numbers) sandwiched by tripled A001477 (nonnegative numbers). 0
0, 0, 0, 2, 1, 1, 1, 4, 2, 2, 2, 6, 3, 3, 3, 8, 4, 4, 4, 10, 5, 5, 5, 12, 6, 6, 6, 14, 7, 7, 7, 16, 8, 8, 8, 18, 9, 9, 9, 20, 10, 10, 10, 22, 11, 11, 11, 24, 12, 12, 12, 26, 13, 13, 13, 28, 14, 14, 14, 30, 15, 15, 15, 32, 16, 16, 16, 34, 17, 17, 17, 36, 18, 18, 18, 38, 19, 19, 19, 40, 20 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

CROSSREFS

Sequence in context: A181876 A131505 A100092 * A140130 A125653 A104445

Adjacent sequences:  A131505 A131506 A131507 * A131509 A131510 A131511

KEYWORD

nonn

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Aug 13 2007

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Last modified February 17 12:23 EST 2012. Contains 206011 sequences.