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.

A383617 Triangle read by rows: T(n,k) is the number of binary relations on a set of n objects, k of which are picked out, 0 <= k <= n.

Table of values

n a(n)
0 1
1 2
2 2
3 10
4 16
5 10
6 104
7 272
8 272
9 104
10 3044
11 11456
12 16960
13 11456
14 3044
15 291968
16 1432608
17 2842304
18 2842304
19 1432608
20 291968
21 96928992
22 578431232
23 1441700480
24 1920352256
25 1441700480
26 578431232
27 96928992
28 112282908928
29 784780122880
30 2351993457920
31 3918054495616
32 3918054495616
33 2351993457920
34 784780122880
35 112282908928

List of values

[1, 2, 2, 10, 16, 10, 104, 272, 272, 104, 3044, 11456, 16960, 11456, 3044, 291968, 1432608, 2842304, 2842304, 1432608, 291968, 96928992, 578431232, 1441700480, 1920352256, 1441700480, 578431232, 96928992, 112282908928, 784780122880, 2351993457920, 3918054495616, 3918054495616, 2351993457920, 784780122880, 112282908928]

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

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