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A003777 Number of stacks of n pikelets, distance 3 flips from a well-ordered stack. +0
4
1, 11, 35, 79, 149, 251, 391, 575, 809, 1099, 1451, 1871, 2365, 2939, 3599, 4351, 5201, 6155, 7219, 8399, 9701, 11131, 12695, 14399, 16249, 18251, 20411, 22735, 25229, 27899, 30751, 33791, 37025, 40459 (list; graph; listen)
OFFSET

3,2

REFERENCES

Marc Paulhus (paulhus(AT)wanadoo.nl), Pikelets, Discrete Math, to be submitted.

FORMULA

n^3+n^2-1.

CROSSREFS

Sequence in context: A118554 A092069 A103115 this_sequence A098116 A123749 A159493

Adjacent sequences: A003774 A003775 A003776 this_sequence A003778 A003779 A003780

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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