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.

A333474 Numbers k such that 2^k + 1 is divisible by the sum of its decimal digits.

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 9
6 98
7 135
8 200
9 665
10 1782
11 4230
12 4521
13 6815
14 17010
15 19635
16 30338
17 31365
18 35427
19 49555
20 96619
21 102897
22 157850
23 193734
24 273050
25 393225
26 449217
27 477333
28 483310
29 493350
30 534465
31 661815
32 918918
33 947925
34 1050858
35 1114690
36 1134945
37 1204686
38 1350990
39 1428105

List of values

[0, 1, 2, 3, 9, 98, 135, 200, 665, 1782, 4230, 4521, 6815, 17010, 19635, 30338, 31365, 35427, 49555, 96619, 102897, 157850, 193734, 273050, 393225, 449217, 477333, 483310, 493350, 534465, 661815, 918918, 947925, 1050858, 1114690, 1134945, 1204686, 1350990, 1428105]

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

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