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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.

A251914 Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to the pentagonal number P(m) for some m.

Table of values

n a(n)
1 0
2 98
3 9700
4 950598
5 93149000
6 9127651498
7 894416697900
8 87643708742798
9 8588189040096400
10 841554882220704498
11 82463790268588944500
12 8080609891439495856598
13 791817305570802005002200
14 77590015336047156994359098
15 7603029685627050583442189500

List of values

[0, 98, 9700, 950598, 93149000, 9127651498, 894416697900, 87643708742798, 8588189040096400, 841554882220704498, 82463790268588944500, 8080609891439495856598, 791817305570802005002200, 77590015336047156994359098, 7603029685627050583442189500]

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

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