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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.

A064439 Numbers n such that sigma(n) - n - 1 = pi(n).

Table of values

n a(n)
1 4
2 55
3 65
4 95
5 125
6 145
7 155
8 185
9 205
10 2779
11 2863
12 55297
13 174691
14 174779
15 487903
16 1301989
17 1302457
18 5254751
19 6383483
20 23140961
21 48267437
22 59651051
23 70111213
24 70111247
25 92514491
26 199445641
27 212210443
28 514269523
29 514269599
30 21881358361
31 1602278990111

List of values

[4, 55, 65, 95, 125, 145, 155, 185, 205, 2779, 2863, 55297, 174691, 174779, 487903, 1301989, 1302457, 5254751, 6383483, 23140961, 48267437, 59651051, 70111213, 70111247, 92514491, 199445641, 212210443, 514269523, 514269599, 21881358361, 1602278990111]

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

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