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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.

A159790 Toothpick number A139250(n) minus triangular number A000217(n).

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 1
5 0
6 2
7 7
8 7
9 2
10 0
11 1
12 1
13 4
14 18
15 35
16 35
17 22
18 12
19 5
20 -3
21 -8
22 -2
23 7
24 3
25 -6
26 -4
27 5
28 17
29 48
30 106
31 155
32 155
33 126
34 100
35 77
36 53
37 32
38 22
39 15
40 -5
41 -30
42 -44
43 -51
44 -55
45 -40
46 2
47 35
48 23
49 -10
50 -32
51 -47
52 -59
53 -52
54 -18
55 11
56 11
57 14
58 48
59 101
60 181
61 328
62 522
63 651
64 651
65 590
66 532

List of values

[0, 0, 0, 1, 1, 0, 2, 7, 7, 2, 0, 1, 1, 4, 18, 35, 35, 22, 12, 5, -3, -8, -2, 7, 3, -6, -4, 5, 17, 48, 106, 155, 155, 126, 100, 77, 53, 32, 22, 15, -5, -30, -44, -51, -55, -40, 2, 35, 23, -10, -32, -47, -59, -52, -18, 11, 11, 14, 48, 101, 181, 328, 522, 651, 651, 590, 532]

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