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A140810
Positions of heptagonal numbers in the EKG sequence.
0
1, 12, 14, 32, 53, 76, 104, 145, 179, 226, 269, 325, 368, 450, 507, 585, 674, 749, 827, 917, 1019, 1127, 1230, 1343, 1473, 1595, 1708, 1832, 1997, 2111, 2257, 2408, 2571, 2727, 2888, 3054, 3198, 3420, 3587, 3766, 4015, 4161, 4383, 4558, 4803, 5033, 5245
OFFSET
1,2
EXAMPLE
5688 is a heptagonal number located at position 5470 in the EKG sequence.
CROSSREFS
Sequence in context: A307167 A238228 A214504 * A330197 A127401 A332876
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Jul 15 2008
EXTENSIONS
a(2) and a(3) interchanged by Georg Fischer, Mar 27 2024
STATUS
approved