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A133217 Indices of triangular numbers which are also decagonal number. +0
1
0, 1, 2, 20, 55, 667, 1856 (list; graph; listen)
OFFSET

1,3
CROSSREFS

Cf. A077443 A077442 A133216.

Sequence in context: A097652 A059211 A139271 this_sequence A001504 A136905 A003283

Adjacent sequences: A133214 A133215 A133216 this_sequence A133218 A133219 A133220

KEYWORD

nonn

AUTHOR

Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 11 2007

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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