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.

A203310 a(n) = A203309(n+1)/A203309(n).

Table of values

n a(n)
0 1
1 2
2 15
3 252
4 7560
5 356400
6 24324300
7 2270268000
8 277880803200
9 43197833952000
10 8315583035760000
11 1942008468966720000
12 540988073497872000000
13 177227692877902867200000
14 67457290601651778828000000
15 29522484828017013792960000000
16 14721879100904484211422720000000

List of values

[1, 2, 15, 252, 7560, 356400, 24324300, 2270268000, 277880803200, 43197833952000, 8315583035760000, 1942008468966720000, 540988073497872000000, 177227692877902867200000, 67457290601651778828000000, 29522484828017013792960000000, 14721879100904484211422720000000]

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

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