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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.

A260860 Base-60 representation of a(n) is the concatenation of the base-60 representations of 1, 2, ..., n, n-1, ..., 1.

Table of values

n a(n)
0 0
1 1
2 3721
3 13402921
4 48250954921
5 173703464074921
6 625332472251274921
7 2251196900199483274921
8 8104308840723833403274921
9 29175511826606141868603274921
10 105031842575782131223980603274921
11 378114633272815673636150700603274921

List of values

[0, 1, 3721, 13402921, 48250954921, 173703464074921, 625332472251274921, 2251196900199483274921, 8104308840723833403274921, 29175511826606141868603274921, 105031842575782131223980603274921, 378114633272815673636150700603274921]

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

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