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Search: id:A005577
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| A005577 |
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Number of arrangements of pennies in rows (see references for precise definition).
(Formerly M0495)
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+0
3
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| 1, 1, 1, 2, 3, 4, 5, 6, 7, 9, 11, 15, 20, 27, 35, 44, 56, 73, 91, 115, 148, 186, 227, 283, 358, 435, 538, 671, 813, 1001, 1233, 1492, 1815, 2223, 2673, 3247, 3933, 4713, 5683, 6850, 8170, 9785
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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F. C. Auluck, On some new types of partitions associated with generalized Ferrers graphs. Proc. Cambridge Philos. Soc. 47, (1951), 679-686.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
E. M. Wright, Stacks, III, Quart. J. Math. Oxford, 23 (1972), 153-158.
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LINKS
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F. C. Auluck, On some new types of partitions associated with generalized ferrers graphs, Math. Proc. Camb. Phil. Soc. 47 (1951) 679-686. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 25 2009]
E. M. Wright, Stacks (III), The Quarterly J. of Math. (Oxford Journals), 23 (2) (1972) 153-158. MR0299575 [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 25 2009]
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CROSSREFS
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Cf. A005575, A005576.
Sequence in context: A026445 A030151 A131617 this_sequence A072966 A059759 A042952
Adjacent sequences: A005574 A005575 A005576 this_sequence A005578 A005579 A005580
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KEYWORD
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nonn,nice,more,new
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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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