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.

A119102 Numbers k such that the k-th triangular number contains only digits {1,2,5}.

Table of values

n a(n)
1 1
2 5
3 6
4 10
5 49
6 66
7 101
8 174
9 205
10 210
11 550
12 666
13 714
14 4806
15 5010
16 6498
17 6666
18 10114
19 14914
20 22410
21 66666
22 71449
23 471701
24 495005
25 666666
26 1500101
27 2246130
28 3241950
29 6666666
30 15591825
31 17408114
32 66666666
33 666666666
34 1024813373
35 1581866714

List of values

[1, 5, 6, 10, 49, 66, 101, 174, 205, 210, 550, 666, 714, 4806, 5010, 6498, 6666, 10114, 14914, 22410, 66666, 71449, 471701, 495005, 666666, 1500101, 2246130, 3241950, 6666666, 15591825, 17408114, 66666666, 666666666, 1024813373, 1581866714]