cp's OEIS Frontend

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.

A073612 Group the positive integers as (1, 2), (3, 4, 5), (6, 7, 8, 9, 10), (11, 12, 13, 14, 15, 16, 17), ... the n-th group containing prime(n) elements. Except the first, all groups contain an odd number of elements and hence have a middle term. Sequence gives the middle terms starting from group 2.

Table of values

n a(n)
2 4
3 8
4 14
5 23
6 35
7 50
8 68
9 89
10 115
11 145
12 179
13 218
14 260
15 305
16 355
17 411
18 471
19 535
20 604
21 676
22 752
23 833
24 919
25 1012
26 1111
27 1213
28 1318
29 1426
30 1537
31 1657
32 1786
33 1920
34 2058
35 2202
36 2352
37 2506
38 2666
39 2831
40 3001
41 3177
42 3357
43 3543
44 3735
45 3930
46 4128
47 4333
48 4550
49 4775

List of values

[4, 8, 14, 23, 35, 50, 68, 89, 115, 145, 179, 218, 260, 305, 355, 411, 471, 535, 604, 676, 752, 833, 919, 1012, 1111, 1213, 1318, 1426, 1537, 1657, 1786, 1920, 2058, 2202, 2352, 2506, 2666, 2831, 3001, 3177, 3357, 3543, 3735, 3930, 4128, 4333, 4550, 4775]

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

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