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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.

A053677 Let Oc(n) = A005900(n) = n-th octahedral number. Consider all integer triples (i,j,k), j >= k > 0, with Oc(i) = Oc(j)+Oc(k), ordered by increasing i; sequence gives j values.

Table of values

n a(n)
1 6
2 40
3 454
4 2600
5 2586
6 20175
7 48103
8 93097
9 105805
10 265195
11 755100
12 803007
13 1211000
14 1111974
15 1493421
16 1499160
17 2622000
18 4309280
19 5127195
20 5574139

List of values

[6, 40, 454, 2600, 2586, 20175, 48103, 93097, 105805, 265195, 755100, 803007, 1211000, 1111974, 1493421, 1499160, 2622000, 4309280, 5127195, 5574139]

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

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