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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.

A224441 Numbers n such that sigma(n)+d(n) and sigma(n+1)+d(n+1) are perfect squares.

Table of values

n a(n)
1 61
2 2369
3 4469
4 8460
5 13208
6 44790
7 162734
8 281560
9 283938
10 334469
11 500465
12 533045
13 609953
14 871853
15 962247
16 1317885
17 1741445
18 1792745
19 2499845
20 3013246
21 4099031
22 5646629
23 7009389
24 7012135
25 8396781
26 8740480
27 8822093
28 11146381
29 11957693
30 15002679
31 18895694

List of values

[61, 2369, 4469, 8460, 13208, 44790, 162734, 281560, 283938, 334469, 500465, 533045, 609953, 871853, 962247, 1317885, 1741445, 1792745, 2499845, 3013246, 4099031, 5646629, 7009389, 7012135, 8396781, 8740480, 8822093, 11146381, 11957693, 15002679, 18895694]

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

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