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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.

A334661 Numbers k such that k*sod(k) and k+sod(k) are both palindromes, where sod(k) denotes the sum of digits of k (A007953).

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 124
6 829
7 186373637
8 186454637
9 187272737
10 195454547
11 23212121199
12 23302120299
13 1230303030288
14 1312121212098
15 1320303030198
16 1321121211198
17 1321203021198
18 1321211121198
19 1330121210298
20 1330203020298
21 1330211120298
22 1330301030298
23 2130303030279

List of values

[0, 1, 2, 3, 124, 829, 186373637, 186454637, 187272737, 195454547, 23212121199, 23302120299, 1230303030288, 1312121212098, 1320303030198, 1321121211198, 1321203021198, 1321211121198, 1330121210298, 1330203020298, 1330211120298, 1330301030298, 2130303030279]

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

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