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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.

A154145 Indices k such that 15 plus the k-th triangular number is a perfect square.

Table of values

n a(n)
1 1
2 4
3 6
4 11
5 20
6 33
7 43
8 70
9 121
10 196
11 254
12 411
13 708
14 1145
15 1483
16 2398
17 4129
18 6676
19 8646
20 13979
21 24068
22 38913
23 50395
24 81478
25 140281
26 226804
27 293726
28 474891
29 817620
30 1321913
31 1711963
32 2767870
33 4765441
34 7704676
35 9978054
36 16132331
37 27775028

List of values

[1, 4, 6, 11, 20, 33, 43, 70, 121, 196, 254, 411, 708, 1145, 1483, 2398, 4129, 6676, 8646, 13979, 24068, 38913, 50395, 81478, 140281, 226804, 293726, 474891, 817620, 1321913, 1711963, 2767870, 4765441, 7704676, 9978054, 16132331, 27775028]

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

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