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.

A144896 Third column of triangle A134134 (S2'(2)= S1hat(2)).

Table of values

n a(n)
0 1
1 2
2 10
3 44
4 228
5 1272
6 8760
7 63936
8 547776
9 5145984
10 54233280
11 624291840
12 7879472640
13 107423677440
14 1579212910080
15 24832164556800
16 416273901926400
17 7403098797158400
18 139238590721126400
19 2760253302701260800
20 57522218527420416000
21 1256931901812400128000

List of values

[1, 2, 10, 44, 228, 1272, 8760, 63936, 547776, 5145984, 54233280, 624291840, 7879472640, 107423677440, 1579212910080, 24832164556800, 416273901926400, 7403098797158400, 139238590721126400, 2760253302701260800, 57522218527420416000, 1256931901812400128000]

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

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