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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.

A085487 a(n) = p^n + q^n, p = (1 + sqrt(21))/2, q = (1 - sqrt(21))/2.

Table of values

n a(n)
1 1
2 11
3 16
4 71
5 151
6 506
7 1261
8 3791
9 10096
10 29051
11 79531
12 224786
13 622441
14 1746371
15 4858576
16 13590431
17 37883311
18 105835466
19 295252021
20 824429351
21 2300689456
22 6422836211
23 17926283491
24 50040464546
25 139671882001
26 389874204731
27 1088233614736

List of values

[1, 11, 16, 71, 151, 506, 1261, 3791, 10096, 29051, 79531, 224786, 622441, 1746371, 4858576, 13590431, 37883311, 105835466, 295252021, 824429351, 2300689456, 6422836211, 17926283491, 50040464546, 139671882001, 389874204731, 1088233614736]

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

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