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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.

A095252 a(n) = floor(sqrt{concatenation n,(n-1),...,3,2,1}).

Table of values

n a(n)
1 1
2 4
3 17
4 65
5 233
6 808
7 2766
8 9362
9 31426
10 104822
11 1054033
12 11005043
13 114547418
14 1188747707
15 12305003905
16 127088210000
17 1310019623181
18 13480213329659
19 138498072735374
20 1420979139942389
21 14560878466498901
22 149036972532711329
23 1523880579042109897

List of values

[1, 4, 17, 65, 233, 808, 2766, 9362, 31426, 104822, 1054033, 11005043, 114547418, 1188747707, 12305003905, 127088210000, 1310019623181, 13480213329659, 138498072735374, 1420979139942389, 14560878466498901, 149036972532711329, 1523880579042109897]

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

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