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Search: id:A117993
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A117993 Heptagonal numbers with only odd digits. +0
1
1, 7, 55, 1177, 3553, 9517, 11799, 13579, 17935, 31753, 71995, 93799, 117397, 121771, 135373, 371911, 599515, 777573, 1331155, 1371591, 1555119, 3391315, 3731377, 3979717, 5131573, 7137715, 7333353, 9193933, 13979515, 15199191 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Cf. A000566.

Sequence in context: A054910 A028562 A094656 this_sequence A055056 A009521 A116120

Adjacent sequences: A117990 A117991 A117992 this_sequence A117994 A117995 A117996

KEYWORD

base,nonn

AUTHOR

Luc Stevens (lms022(AT)yahoo.com), May 03 2006

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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