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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.

A171510 a(n) = 10*a(n-1) + a(n-2), with a(1)=2 and a(2)=1.

Table of values

n a(n)
1 2
2 1
3 12
4 121
5 1222
6 12341
7 124632
8 1258661
9 12711242
10 128371081
11 1296422052
12 13092591601
13 132222338062
14 1335315972221
15 13485382060272
16 136189136574941
17 1375376747809682
18 13889956614671761
19 140274942894527292
20 1416639385559944681
21 14306668798493974102

List of values

[2, 1, 12, 121, 1222, 12341, 124632, 1258661, 12711242, 128371081, 1296422052, 13092591601, 132222338062, 1335315972221, 13485382060272, 136189136574941, 1375376747809682, 13889956614671761, 140274942894527292, 1416639385559944681, 14306668798493974102]

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

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