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.

A102865 Base-4 digits are, in order, the first n terms of the sequence (1, 3, 21, 203, 2021, 20203, 202021, 2020203, 20202021, 202020203, ... ).

Table of values

n a(n)
0 1
1 3
2 9
3 35
4 137
5 547
6 2185
7 8739
8 34953
9 139811
10 559241
11 2236963
12 8947849
13 35791395
14 143165577
15 572662307
16 2290649225
17 9162596899
18 36650387593
19 146601550371
20 586406201481
21 2345624805923
22 9382499223689
23 37529996894755
24 150119987579017
25 600479950316067

List of values

[1, 3, 9, 35, 137, 547, 2185, 8739, 34953, 139811, 559241, 2236963, 8947849, 35791395, 143165577, 572662307, 2290649225, 9162596899, 36650387593, 146601550371, 586406201481, 2345624805923, 9382499223689, 37529996894755, 150119987579017, 600479950316067]