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Search: id:A005575
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| A005575 |
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Number of arrangements of pennies in rows (see references for precise definition).
(Formerly M1390)
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+0
5
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| 0, 0, 1, 2, 5, 11, 20, 37, 63, 110, 174, 283, 435, 671, 1001, 2160, 3127, 4442, 6269, 8739, 12109, 16597, 22618, 30576
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
F. C. Auluck, On some new types of partitions associated with generalized Ferrers graphs. Proc. Cambridge Philos. Soc. 47, (1951), 679-686.
E. M. Wright, Stacks, III, Quart. J. Math. Oxford, 23 (1972), 153-158.
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CROSSREFS
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Cf. A005576, A005577.
Sequence in context: A038377 A022908 A026390 this_sequence A050407 A113032 A100134
Adjacent sequences: A005572 A005573 A005574 this_sequence A005576 A005577 A005578
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), R. K. Guy
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