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.

A115111 Number of different ways to select n elements from four sets of n elements under the precondition of choosing at least one element from each set.

Table of values

n a(n)
1 0
2 0
3 0
4 256
5 5000
6 65880
7 739508
8 7653632
9 75687696
10 728589000
11 6899424840
12 64678048600
13 602586261420
14 5593531747076
15 51815550195500
16 479511147907328
17 4436081306716064
18 41044438822080816
19 379913227858140396

List of values

[0, 0, 0, 256, 5000, 65880, 739508, 7653632, 75687696, 728589000, 6899424840, 64678048600, 602586261420, 5593531747076, 51815550195500, 479511147907328, 4436081306716064, 41044438822080816, 379913227858140396]