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.

A078702 Number of ways to lace a shoe that has n pairs of eyelets such that each eyelet has at least one direct connection to the opposite side.

Table of values

n a(n)
1 1
2 2
3 13
4 213
5 7584
6 454380
7 39665160
8 4775586480
9 756765576000
10 152553490810560
11 38148245068953600
12 11587644586640707200
13 4202354709635579481600
14 1793612851748170637184000
15 889985376998423302704307200
16 508018135094443467957310848000
17 330553193467656241628008759296000

List of values

[1, 2, 13, 213, 7584, 454380, 39665160, 4775586480, 756765576000, 152553490810560, 38148245068953600, 11587644586640707200, 4202354709635579481600, 1793612851748170637184000, 889985376998423302704307200, 508018135094443467957310848000, 330553193467656241628008759296000]

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

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