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A140810 Positions of heptagonal numbers in the EKG sequence. 0
1, 14, 12, 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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..47.

EXAMPLE

5688 is a heptagonal number located at position 5470 in the EKG sequence.

CROSSREFS

Cf. A000566, A064413.

Sequence in context: A305938 A206605 A004503 * A166041 A115019 A022970

Adjacent sequences:  A140807 A140808 A140809 * A140811 A140812 A140813

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Jul 15 2008

STATUS

approved

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Last modified May 21 15:27 EDT 2019. Contains 323444 sequences. (Running on oeis4.)