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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.

A031618 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 30.

Table of values

n a(n)
1 5801
2 11498
3 18577
4 28345
5 29021
6 39373
7 40169
8 51754
9 54049
10 66853
11 85625
12 100297
13 102841
14 121633
15 124433
16 125138
17 126554
18 142001
19 143509
20 144266
21 145786
22 146549
23 148081
24 150394
25 170473
26 175453
27 194441
28 201545
29 218117
30 219985
31 224690

List of values

[5801, 11498, 18577, 28345, 29021, 39373, 40169, 51754, 54049, 66853, 85625, 100297, 102841, 121633, 124433, 125138, 126554, 142001, 143509, 144266, 145786, 146549, 148081, 150394, 170473, 175453, 194441, 201545, 218117, 219985, 224690]

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

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