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.

A129090 a(1)=1; a(n) = gcd(a(n-1), n) + lcm(a(n-1), n).

Table of values

n a(n)
1 1
2 3
3 6
4 14
5 71
6 427
7 434
8 1738
9 15643
10 156431
11 156442
12 938654
13 12202503
14 170835043
15 2562525646
16 20500205170
17 348503487891
18 2091020927349
19 39729397619632
20 198646988098164
21 1390528916687151
22 30591636167117323
23 703607631843698430

List of values

[1, 3, 6, 14, 71, 427, 434, 1738, 15643, 156431, 156442, 938654, 12202503, 170835043, 2562525646, 20500205170, 348503487891, 2091020927349, 39729397619632, 198646988098164, 1390528916687151, 30591636167117323, 703607631843698430]

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

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