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.

A069558 Triangular numbers in which the k-th digit, numbering them from right to left, either divides k or is a nonzero multiple of k. Is 1 only when k has no other single-digit divisor (less than 10).

Table of values

n a(n)
1 1
2 3
3 6
4 21
5 28
6 45
7 66
8 325
9 666
10 946
11 2346
12 2628
13 2926
14 8385
15 8646
16 52326
17 54946

List of values

[1, 3, 6, 21, 28, 45, 66, 325, 666, 946, 2346, 2628, 2926, 8385, 8646, 52326, 54946]

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

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