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A004163 Pentagonal numbers written backwards. 0
1, 5, 21, 22, 53, 15, 7, 29, 711, 541, 671, 12, 742, 782, 33, 673, 524, 774, 235, 95, 156, 517, 287, 258, 529, 1001, 801, 2611, 7421, 5331, 6241, 251, 7161, 7171, 281, 6291, 5302, 7412, 2622, 832, 1052, 5262 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Cf. A000326.

Sequence in context: A204914 A165204 A043053 * A113410 A099654 A195959

Adjacent sequences:  A004160 A004161 A004162 * A004164 A004165 A004166

KEYWORD

nonn,base

AUTHOR

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

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Last modified February 14 23:16 EST 2012. Contains 205687 sequences.