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.

A031621 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 33.

Table of values

n a(n)
1 2509
2 13738
3 23185
4 61729
5 64234
6 79813
7 80378
8 81514
9 83233
10 98957
11 101485
12 102761
13 147218
14 150298
15 151073
16 152629
17 171194
18 172021
19 175349
20 176186
21 177866
22 178709
23 180401
24 205033
25 231241
26 233165
27 235097
28 238985
29 263105
30 265157
31 267217

List of values

[2509, 13738, 23185, 61729, 64234, 79813, 80378, 81514, 83233, 98957, 101485, 102761, 147218, 150298, 151073, 152629, 171194, 172021, 175349, 176186, 177866, 178709, 180401, 205033, 231241, 233165, 235097, 238985, 263105, 265157, 267217]

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

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