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.

A381135 Numbers of the form d_1 d_2 d_3 ... where the sum of their digits multiplied by their digit positions is equal to their number of digits.

Table of values

n a(n)
1 1
2 20
3 110
4 300
5 1010
6 2100
7 4000
8 10010
9 12000
10 20100
11 31000
12 50000
13 100010
14 111000
15 200100
16 220000
17 301000
18 410000
19 600000
20 1000010
21 1020000
22 1101000
23 1300000
24 2000100
25 2110000
26 3001000
27 3200000
28 4010000
29 5100000
30 7000000
31 10000010
32 10110000
33 11001000
34 12100000

List of values

[1, 20, 110, 300, 1010, 2100, 4000, 10010, 12000, 20100, 31000, 50000, 100010, 111000, 200100, 220000, 301000, 410000, 600000, 1000010, 1020000, 1101000, 1300000, 2000100, 2110000, 3001000, 3200000, 4010000, 5100000, 7000000, 10000010, 10110000, 11001000, 12100000]

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

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