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.

A172425 Pentagonal pyramidal numbers which are the sum of two other such numbers: A002411(k) = A002411(i)+A002411(j) with i,j>0.

Table of values

n a(n)
1 37926
2 279046
3 2514726
4 34797726
5 71254566
6 348145726
7 566225926
8 606245926
9 828497488
10 1206646551
11 8750871976
12 11481404326
13 21078151200
14 28120290876
15 62963640936
16 75128827176
17 77009692800
18 96868002726
19 120282238710
20 147061923750
21 165998399400
22 297022824126
23 325443925926
24 416397477888

List of values

[37926, 279046, 2514726, 34797726, 71254566, 348145726, 566225926, 606245926, 828497488, 1206646551, 8750871976, 11481404326, 21078151200, 28120290876, 62963640936, 75128827176, 77009692800, 96868002726, 120282238710, 147061923750, 165998399400, 297022824126, 325443925926, 416397477888]

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

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