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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.

A375507 a(1) = 1. For n > 1; a(n) is equal to a(n-1) plus the decimal value of the concatenation of the first n-1 digits of the sequence.

Table of values

n a(n)
1 1
2 2
3 14
4 135
5 1349
6 13490
7 134903
8 1349038
9 13490389
10 134903902
11 1349039036
12 13490390385
13 134903903876
14 1349039038789
15 13490390387923
16 134903903879272
17 1349039038792762
18 13490390387927663
19 134903903879276676
20 1349039038792766810
21 13490390387927668159

List of values

[1, 2, 14, 135, 1349, 13490, 134903, 1349038, 13490389, 134903902, 1349039036, 13490390385, 134903903876, 1349039038789, 13490390387923, 134903903879272, 1349039038792762, 13490390387927663, 134903903879276676, 1349039038792766810, 13490390387927668159]

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

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