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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.

A272158 Expansion of e.g.f.: (sin(x) + sin(4*x)) / sin(5*x), even-indexed terms only.

Table of values

n a(n)
0 1
1 4
2 116
3 8764
4 1242356
5 283202524
6 94690800596
7 43653497804284
8 26538141745926836
9 20569900661155862044
10 19799583458238177373076
11 23170654021955185224223804
12 32397957659053038859810291316
13 53342240536065395589518876137564
14 102148810140776173440241789042633556
15 225108984136852617968906778958292851324
16 565646056287498262815832721506444163551796

List of values

[1, 4, 116, 8764, 1242356, 283202524, 94690800596, 43653497804284, 26538141745926836, 20569900661155862044, 19799583458238177373076, 23170654021955185224223804, 32397957659053038859810291316, 53342240536065395589518876137564, 102148810140776173440241789042633556, 225108984136852617968906778958292851324, 565646056287498262815832721506444163551796]

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

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