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.

A130471 First differences of antidiagonal sums of triangular array T: T(j,k) = k*(j-k)! for k < j, T(j,k) = 1 for k = j; 1 <= k <= j.

Table of values

n a(n)
1 0
2 2
3 5
4 21
5 106
6 640
7 4527
8 36539
9 331508
10 3338358
11 36946489
12 445724977
13 5821580670
14 81839381996
15 1232102291651
16 19778348559015
17 337223021210632
18 6086161135368034
19 115915940643233613
20 2323409451689985053

List of values

[0, 2, 5, 21, 106, 640, 4527, 36539, 331508, 3338358, 36946489, 445724977, 5821580670, 81839381996, 1232102291651, 19778348559015, 337223021210632, 6086161135368034, 115915940643233613, 2323409451689985053]

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

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