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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.

A230550 Voids left after packing twin hearts patterns into n X n coins.

Table of values

n a(n)
2 1
3 2
4 5
5 10
6 13
7 22
8 33
9 40
10 51
11 68
12 73
13 94
14 113
15 126
16 145
17 174
18 181
19 214
20 241
21 260
22 287
23 328
24 337
25 382
26 417
27 442
28 477
29 530
30 541
31 598
32 641
33 672
34 715
35 780
36 793
37 862
38 913
39 950
40 1001
41 1078
42 1093
43 1174
44 1233
45 1276
46 1335
47 1424

List of values

[1, 2, 5, 10, 13, 22, 33, 40, 51, 68, 73, 94, 113, 126, 145, 174, 181, 214, 241, 260, 287, 328, 337, 382, 417, 442, 477, 530, 541, 598, 641, 672, 715, 780, 793, 862, 913, 950, 1001, 1078, 1093, 1174, 1233, 1276, 1335, 1424]

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

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