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.

A293981 Start with 209; if even, divide by 2; if odd, add the next three primes: Trajectory of 209 under iterations of A174221, the "PrimeLatz" map.

Table of values

n a(n)
0 209
1 870
2 435
3 1766
4 883
5 3588
6 1794
7 897
8 3634
9 1817
10 7318
11 3659
12 14680
13 7340
14 3670
15 1835
16 7410
17 3705
18 14860
19 7430
20 3715
21 14894
22 7447
23 29814
24 14907
25 59698
26 29849
27 119430
28 59715
29 238910
30 119455
31 477960
32 238980
33 119490
34 59745
35 239016
36 119508
37 59754
38 29877
39 119554
40 59777

List of values

[209, 870, 435, 1766, 883, 3588, 1794, 897, 3634, 1817, 7318, 3659, 14680, 7340, 3670, 1835, 7410, 3705, 14860, 7430, 3715, 14894, 7447, 29814, 14907, 59698, 29849, 119430, 59715, 238910, 119455, 477960, 238980, 119490, 59745, 239016, 119508, 59754, 29877, 119554, 59777]