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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.

A067799 Numbers k such that phi(k) + phi(k+1) = sigma(k).

Table of values

n a(n)
1 2
2 3
3 5
4 115
5 143
6 287
7 371
8 413
9 623
10 791
11 4067
12 10031
13 24149
14 32335
15 39689
16 88403
17 93443
18 107365
19 148735
20 168833
21 212993
22 427763
23 555947
24 650095
25 925253
26 1017821
27 1117457
28 1139467
29 1229327
30 1270801
31 1407295
32 2184221
33 2294509
34 2913757
35 3258355
36 4699981
37 5747291

List of values

[2, 3, 5, 115, 143, 287, 371, 413, 623, 791, 4067, 10031, 24149, 32335, 39689, 88403, 93443, 107365, 148735, 168833, 212993, 427763, 555947, 650095, 925253, 1017821, 1117457, 1139467, 1229327, 1270801, 1407295, 2184221, 2294509, 2913757, 3258355, 4699981, 5747291]

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

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