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.

A203719 A204521(n)^2 = floor[A055812(n)/5]: Squares which written in base 5, with some digit appended, yield another square.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 9
6 16
7 64
8 441
9 3025
10 5184
11 20736
12 142129
13 974169
14 1669264
15 6677056
16 45765225
17 313679521
18 537497856
19 2149991424
20 14736260449
21 101003831721
22 173072640400
23 692290561600
24 4745030099481
25 32522920134769
26 55728852710976
27 222915410843904

List of values

[0, 0, 0, 1, 9, 16, 64, 441, 3025, 5184, 20736, 142129, 974169, 1669264, 6677056, 45765225, 313679521, 537497856, 2149991424, 14736260449, 101003831721, 173072640400, 692290561600, 4745030099481, 32522920134769, 55728852710976, 222915410843904]

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

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