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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.

A245438 a(n) = the number of ways in which n is equal to the sum of digits > 0 taken from numbers <= n.

Table of values

n a(n)
1 1
2 1
3 2
4 2
5 3
6 4
7 5
8 6
9 8
10 17
11 53
12 158
13 450
14 1224
15 3195
16 8036
17 19585
18 46549
19 108541
20 219677
21 664149
22 1891075
23 5091680
24 13004347
25 31632641
26 73745789
27 166055768
28 364027232
29 782374631
30 1462836178
31 4198493416
32 11171538552
33 27755958012

List of values

[1, 1, 2, 2, 3, 4, 5, 6, 8, 17, 53, 158, 450, 1224, 3195, 8036, 19585, 46549, 108541, 219677, 664149, 1891075, 5091680, 13004347, 31632641, 73745789, 166055768, 364027232, 782374631, 1462836178, 4198493416, 11171538552, 27755958012]

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

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