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.

A258128 Octagonal numbers (A000567) that are the sum of two consecutive octagonal numbers.

Table of values

n a(n)
1 5461
2 813281
3 7272157205
4 1083057360705
5 9684433559760981
6 1442322650052752161
7 12896895753596262561301
8 1920761265591267733640321
9 17174976631595008767000306005
10 2557904668044167195987033355105
11 22872156829955018609383449248248341

List of values

[5461, 813281, 7272157205, 1083057360705, 9684433559760981, 1442322650052752161, 12896895753596262561301, 1920761265591267733640321, 17174976631595008767000306005, 2557904668044167195987033355105, 22872156829955018609383449248248341]

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

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