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Search: id:A028294
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| A028294 |
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Number of stacks of n pikelets, distance 5 flips from a well-ordered stack. |
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+0
2
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| 1, 20, 281, 1357, 4281, 10666, 22825, 43891, 77937, 130096, 206681, 315305, 465001, 666342, 931561, 1274671, 1711585, 2260236, 2940697, 3775301, 4788761, 6008290, 7463721, 9187627, 11215441, 13585576, 16339545, 19522081, 23181257, 27368606
(list; graph; listen)
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OFFSET
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4,2
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REFERENCES
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Marc Paulhus (paulhus(AT)wanadoo.nl), Pikelets, Discrete Math, to be submitted.
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FORMULA
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n^5 - 65/6*n^4 + 173/6*n^3 + 148/3*n^2 - 862/3*n + 265.
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CROSSREFS
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Sequence in context: A021474 A017999 A012836 this_sequence A019040 A021204 A017953
Adjacent sequences: A028291 A028292 A028293 this_sequence A028295 A028296 A028297
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KEYWORD
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nonn
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AUTHOR
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R. K. Guy
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EXTENSIONS
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More terms from David Wasserman (dwasserm(AT)earthlink.net), Jan 22 2005
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