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A196496 Palindromic centered 37-gonal numbers. 0
1, 2636362, 106515601, 3066863686603, 148749979947841, 219339595933912, 853637858736358 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The centered k-gonal numbers are defined in trottermath.net as (k*n^2-k*n+2)/2, and elsewhere with a slightly different standard index n as (k*n^2+k*n+2)/2. The centered 37-gonal numbers are 1, 38, 112, 223, 371, 556, 778,.... A086272(36,n), where A086272 uses yet another index convention for k. The sequence is generated by centered 37-gonal numbers with standard indices n=1, 377, 2399, 407156,...

LINKS

Table of n, a(n) for n=1..7.

T. Trotter, Polygonal numbers

CROSSREFS

Sequence in context: A233723 A162026 A229799 * A105380 A250911 A157840

Adjacent sequences:  A196493 A196494 A196495 * A196497 A196498 A196499

KEYWORD

nonn,base,more

AUTHOR

Kausthub Gudipati, Oct 03 2011

STATUS

approved

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Last modified December 1 09:28 EST 2020. Contains 338833 sequences. (Running on oeis4.)