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Search: id:A054910
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A054910 Palindromic heptagonal numbers (A000566). +0
3
1, 7, 55, 616, 3553, 4774, 60606, 848848, 4615164, 5400045, 6050506, 7165445617, 62786368726, 65331413356, 73665056637, 91120102119, 345546645543, 365139931563, 947927729749, 3646334336463, 7111015101117, 717685292586717 (list; graph; listen)
OFFSET

1,2
LINKS

P. De Geest, Palindromic Heptagonals

CROSSREFS

Cf. A054971, A000566.

Sequence in context: A112243 A083836 A159313 this_sequence A028562 A094656 A117993

Adjacent sequences: A054907 A054908 A054909 this_sequence A054911 A054912 A054913

KEYWORD

nonn,base

AUTHOR

Jeffrey Heleen (meriadoc(AT)cheshire.net), May 26 2000

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Last modified December 9 14:43 EST 2009. Contains 170430 sequences.

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