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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.

A273031 Expansion of e.g.f.: (sin(x) + sin(6*x)) / sin(7*x), even-indexed terms only.

Table of values

n a(n)
0 1
1 6
2 330
3 48726
4 13534410
5 6046913046
6 3962771924490
7 3580686141374166
8 4266519857080266570
9 6481738795978992136086
10 12228451239686387772736650
11 28048508112504152087554462806
12 76867928701091608252297826870730
13 248058932215537567368765344245378326
14 931049990613171839116868739409352364810
15 4021504762182514582910341826029900914866646

List of values

[1, 6, 330, 48726, 13534410, 6046913046, 3962771924490, 3580686141374166, 4266519857080266570, 6481738795978992136086, 12228451239686387772736650, 28048508112504152087554462806, 76867928701091608252297826870730, 248058932215537567368765344245378326, 931049990613171839116868739409352364810, 4021504762182514582910341826029900914866646]

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

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