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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.

A087770 "Lonely primes": those primes that are locally maximally isolated from the nearest other primes. The differences between each lonely prime and the immediately preceding prime and following primes are both greater than the corresponding differences for all lonely primes earlier in the sequence.

Table of values

n a(n)
1 2
2 3
3 7
4 23
5 89
6 211
7 1847
8 2179
9 14107
10 33247
11 38501
12 58831
13 268343
14 1272749
15 2198981
16 10938023
17 72546283
18 162821917
19 325737821
20 2888688863
21 6613941601
22 11179888193
23 24016237123
24 96155166493
25 179474021633
26 215686840471
27 633880576177
28 1480975873513
29 9156364643509

List of values

[2, 3, 7, 23, 89, 211, 1847, 2179, 14107, 33247, 38501, 58831, 268343, 1272749, 2198981, 10938023, 72546283, 162821917, 325737821, 2888688863, 6613941601, 11179888193, 24016237123, 96155166493, 179474021633, 215686840471, 633880576177, 1480975873513, 9156364643509]

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

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