cp's OEIS Frontend

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.

A258486 Number of tangled chains of length k=3.

Table of values

n a(n)
1 1
2 1
3 5
4 151
5 9944
6 1196991
7 226435150
8 61992679960
9 23198439767669
10 11380100883484302
11 7087878538028540725
12 5465174495550911165171
13 5111311778783673593594175
14 5701234859347275019419890715
15 7477492710871626347942014991975
16 11393306956061559325223329489826611
17 19958666934810234750929365717573438949
18 39835206091758734935374720734513530255512
19 89867076346063005007676287874769844881101800
20 227547795689116560408812799327387232156371842150

List of values

[1, 1, 5, 151, 9944, 1196991, 226435150, 61992679960, 23198439767669, 11380100883484302, 7087878538028540725, 5465174495550911165171, 5111311778783673593594175, 5701234859347275019419890715, 7477492710871626347942014991975, 11393306956061559325223329489826611, 19958666934810234750929365717573438949, 39835206091758734935374720734513530255512, 89867076346063005007676287874769844881101800, 227547795689116560408812799327387232156371842150]

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

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