cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A137880 Indices k of perfect squares among 17-gonal numbers A051869(k) = k*(15*k - 13)/2.

Table of values

n a(n)
1 1
2 49
3 225
4 23409
5 108241
6 11282881
7 52171729
8 5438325025
9 25146664929
10 2621261378961
11 12120640323841
12 1263442546333969
13 5842123489426225
14 608976686071593889
15 2815891401263116401
16 293525499243961920321
17 1357253813285332678849
18 141478681658903574000625

List of values

[1, 49, 225, 23409, 108241, 11282881, 52171729, 5438325025, 25146664929, 2621261378961, 12120640323841, 1263442546333969, 5842123489426225, 608976686071593889, 2815891401263116401, 293525499243961920321, 1357253813285332678849, 141478681658903574000625]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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