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.

A128832 Number of n-tuples where each entry is chosen from the subsets of {1,2,3,4} such that the intersection of all n entries is empty.

Table of values

n a(n)
1 1
2 81
3 2401
4 50625
5 923521
6 15752961
7 260144641
8 4228250625
9 68184176641
10 1095222947841
11 17557851463681
12 281200199450625
13 4501401006735361
14 72040003462430721
15 1152780773560811521
16 18445618199572250625

List of values

[1, 81, 2401, 50625, 923521, 15752961, 260144641, 4228250625, 68184176641, 1095222947841, 17557851463681, 281200199450625, 4501401006735361, 72040003462430721, 1152780773560811521, 18445618199572250625]