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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.

A343198 Regular triangle T(n,k) of Dellac configurations with boundaries, n>=1 and k>=0.

Table of values

n a(n)
1 1
2 2
3 3
4 7
5 9
6 15
7 38
8 45
9 63
10 111
11 295
12 333
13 423
14 621
15 1131
16 3098
17 3393
18 4059
19 5373
20 8127
21 15123
22 42271
23 45369
24 52155
25 64665
26 87939
27 135729
28 256335
29 726734
30 769005
31 859743
32 1019601
33 1295163
34 1794825
35 2810403
36 5364471
37 15366679
38 16093413
39 17631423
40 20256021
41 24549831
42 31731453
43 44583183
44 70558101
45 135751731

List of values

[1, 2, 3, 7, 9, 15, 38, 45, 63, 111, 295, 333, 423, 621, 1131, 3098, 3393, 4059, 5373, 8127, 15123, 42271, 45369, 52155, 64665, 87939, 135729, 256335, 726734, 769005, 859743, 1019601, 1295163, 1794825, 2810403, 5364471, 15366679, 16093413, 17631423, 20256021, 24549831, 31731453, 44583183, 70558101, 135751731]

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

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