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A117663 Heptagonal numbers for which the digital root is also a heptagonal number. 0
1, 7, 34, 55, 235, 286, 403, 469, 874, 970, 1177, 1288, 1918, 2059, 2356, 2512, 3367, 3553, 3940, 4141, 5221, 5452, 5929, 6175, 7480, 7756, 8323, 8614, 10144, 10465, 11122, 11458, 13213, 13579, 14326, 14707, 16687, 17098, 17935, 18361, 20566 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Cf. A000566.

Sequence in context: A202762 A202757 A001795 * A063166 A195018 A024817

Adjacent sequences:  A117660 A117661 A117662 * A117664 A117665 A117666

KEYWORD

nonn,base

AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 11 2006

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Last modified February 16 12:15 EST 2012. Contains 205909 sequences.