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A133929 Positive integers that cannot be expressed using four pentagonal numbers. +0
1
9, 21, 31, 43, 55, 89 (list; graph; listen)
OFFSET

1,1
LINKS

Eric Weisstein's World of Mathematics, Pentagonal Number

CROSSREFS

Cf. A000326, A007527.

Sequence in context: A045252 A139538 A110701 this_sequence A086470 A017629 A107978

Adjacent sequences: A133926 A133927 A133928 this_sequence A133930 A133931 A133932

KEYWORD

nonn,fini

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Sep 29, 2007

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Last modified December 4 21:35 EST 2008. Contains 151309 sequences.

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