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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.

A208176 a(n) = F(n+1)^2, if n>=0 is even (F=A000045) and a(n) = (L(2n+2)+8)/5, if n is odd (L=A000204).

Table of values

n a(n)
0 1
1 3
2 4
3 11
4 25
5 66
6 169
7 443
8 1156
9 3027
10 7921
11 20738
12 54289
13 142131
14 372100
15 974171
16 2550409
17 6677058
18 17480761
19 45765227
20 119814916
21 313679523
22 821223649
23 2149991426
24 5628750625
25 14736260451
26 38580030724
27 101003831723
28 264431464441
29 692290561602

List of values

[1, 3, 4, 11, 25, 66, 169, 443, 1156, 3027, 7921, 20738, 54289, 142131, 372100, 974171, 2550409, 6677058, 17480761, 45765227, 119814916, 313679523, 821223649, 2149991426, 5628750625, 14736260451, 38580030724, 101003831723, 264431464441, 692290561602]

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

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