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.

A327584 Number T(n,k) of colored compositions of n using all colors of a k-set such that all parts have different color patterns and the patterns for parts i have i distinct colors in increasing order; triangle T(n,k), k>=0, k<=n<=k*2^(k-1), read by columns.

Table of values

n a(n)
0 1
1 1
2 3
3 4
4 6
5 13
6 48
7 150
8 300
9 666
10 936
11 1824
12 2520
13 2160
14 5040
15 75
16 536
17 2820
18 11144
19 41346
20 131304
21 420084
22 1191552
23 3427008
24 9207456
25 23466720
26 61522560
27 141553560
28 345346560
29 777152160
30 1635096960
31 3700806480
32 6998261760
33 14211912960
34 27442437120

List of values

[1, 1, 3, 4, 6, 13, 48, 150, 300, 666, 936, 1824, 2520, 2160, 5040, 75, 536, 2820, 11144, 41346, 131304, 420084, 1191552, 3427008, 9207456, 23466720, 61522560, 141553560, 345346560, 777152160, 1635096960, 3700806480, 6998261760, 14211912960, 27442437120]