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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.

A170926 Total number of squares and rectangles at the n-th stage in the corner toothpick structure (see A152890, A153006).

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 4
5 5
6 10
7 17
8 20
9 21
10 25
11 30
12 33
13 40
14 58
15 77
16 84
17 85
18 89
19 94
20 97
21 104
22 121
23 138
24 145
25 151
26 164
27 177
28 190
29 222
30 278
31 325
32 340
33 341
34 345
35 350
36 353
37 360
38 377
39 394
40 401
41 407
42 420
43 433
44 446
45 478
46 533
47 578
48 593
49 599
50 612
51 625
52 638
53 669
54 720
55 761
56 781
57 806
58 845
59 884
60 942

List of values

[0, 0, 1, 3, 4, 5, 10, 17, 20, 21, 25, 30, 33, 40, 58, 77, 84, 85, 89, 94, 97, 104, 121, 138, 145, 151, 164, 177, 190, 222, 278, 325, 340, 341, 345, 350, 353, 360, 377, 394, 401, 407, 420, 433, 446, 478, 533, 578, 593, 599, 612, 625, 638, 669, 720, 761, 781, 806, 845, 884, 942]

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

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