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.

A119034 Numbers k such that the k-th triangular number contains only digits {0,1,2}.

Table of values

n a(n)
1 1
2 4
3 6
4 15
5 20
6 66
7 141
8 200
9 473
10 666
11 2000
12 6666
13 14840
14 15620
15 20000
16 49193
17 66666
18 154926
19 200000
20 494006
21 666666
22 2000000
23 4939858
24 6666666
25 20000000
26 66666666
27 200000000
28 200105073
29 651307933
30 666666666
31 1563400141

List of values

[1, 4, 6, 15, 20, 66, 141, 200, 473, 666, 2000, 6666, 14840, 15620, 20000, 49193, 66666, 154926, 200000, 494006, 666666, 2000000, 4939858, 6666666, 20000000, 66666666, 200000000, 200105073, 651307933, 666666666, 1563400141]