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.

A169943 Second entry in row n of triangle in A169940.

Table of values

n a(n)
2 1
3 0
4 3
5 4
6 7
7 8
8 21
9 20
10 53
11 56
12 89
13 112
14 197
15 220
16 397
17 456
18 711
19 850
20 1347
21 1428
22 2303
23 2642
24 3777
25 4636
26 6693
27 7550
28 11109
29 12876
30 17965
31 21000
32 29207
33 32952
34 46263
35 53372
36 71069
37 82660
38 111877
39 126042
40 172461
41 195898
42 256577

List of values

[1, 0, 3, 4, 7, 8, 21, 20, 53, 56, 89, 112, 197, 220, 397, 456, 711, 850, 1347, 1428, 2303, 2642, 3777, 4636, 6693, 7550, 11109, 12876, 17965, 21000, 29207, 32952, 46263, 53372, 71069, 82660, 111877, 126042, 172461, 195898, 256577]

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

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