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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.

A346637 a(n) is the number of quintuples (a_1,a_2,a_3,a_4,a_5) having all terms in {1,...,n} such that there exists a pentagon with these side-lengths.

Table of values

n a(n)
0 0
1 1
2 32
3 243
4 1019
5 3095
6 7671
7 16527
8 32138
9 57789
10 97690
11 157091
12 242397
13 361283
14 522809
15 737535
16 1017636
17 1377017
18 1831428
19 2398579
20 3098255
21 3952431
22 4985387
23 6223823
24 7696974
25 9436725
26 11477726
27 13857507
28 16616593
29 19798619
30 23450445
31 27622271
32 32367752

List of values

[0, 1, 32, 243, 1019, 3095, 7671, 16527, 32138, 57789, 97690, 157091, 242397, 361283, 522809, 737535, 1017636, 1377017, 1831428, 2398579, 3098255, 3952431, 4985387, 6223823, 7696974, 9436725, 11477726, 13857507, 16616593, 19798619, 23450445, 27622271, 32367752]

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

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