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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.

A260858 Base-8 representation of a(n) is the concatenation of the base-8 representations of 1, 2, ..., n, n-1, ..., 1.

Table of values

n a(n)
0 0
1 1
2 81
3 5329
4 342225
5 21911761
6 1402427601
7 89755965649
8 45954960939217
9 188231512819194065
10 770996276517410920657
11 3158000748616424634669265
12 12935171066332946781853145297
13 52982460687699754593548358342865
14 217016158976818195107979529799293137

List of values

[0, 1, 81, 5329, 342225, 21911761, 1402427601, 89755965649, 45954960939217, 188231512819194065, 770996276517410920657, 3158000748616424634669265, 12935171066332946781853145297, 52982460687699754593548358342865, 217016158976818195107979529799293137]

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

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