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.

A053063 Pendulum numbers: alternately append n to beginning or end of previous term.

Table of values

n a(n)
1 1
2 21
3 213
4 4213
5 42135
6 642135
7 6421357
8 86421357
9 864213579
10 10864213579
11 1086421357911
12 121086421357911
13 12108642135791113
14 1412108642135791113
15 141210864213579111315
16 16141210864213579111315
17 1614121086421357911131517
18 181614121086421357911131517
19 18161412108642135791113151719

List of values

[1, 21, 213, 4213, 42135, 642135, 6421357, 86421357, 864213579, 10864213579, 1086421357911, 121086421357911, 12108642135791113, 1412108642135791113, 141210864213579111315, 16141210864213579111315, 1614121086421357911131517, 181614121086421357911131517, 18161412108642135791113151719]

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

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