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.

A357297 T(m,n) is the number of linear extensions of n fork-join DAGs of width m, read by downward antidiagonals.

Table of values

n a(n)
0 1
1 1
2 1
3 6
4 1
5 1
6 90
7 20
8 2
9 1
10 2520
11 1680
12 280
13 6
14 1
15 113400
16 369600
17 277200
18 9072
19 24
20 1
21 7484400
22 168168000
23 1009008000
24 163459296
25 532224
26 120
27 1
28 681080400
29 137225088000
30 9777287520000
31 15205637551104
32 237124952064
33 49420800
34 720
35 1
36 81729648000
37 182509367040000
38 207786914375040000
39 4847253138540933120
40 765985681152147456
41 689598074880000
42 6671808000
43 5040
44 1

List of values

[1, 1, 1, 6, 1, 1, 90, 20, 2, 1, 2520, 1680, 280, 6, 1, 113400, 369600, 277200, 9072, 24, 1, 7484400, 168168000, 1009008000, 163459296, 532224, 120, 1, 681080400, 137225088000, 9777287520000, 15205637551104, 237124952064, 49420800, 720, 1, 81729648000, 182509367040000, 207786914375040000, 4847253138540933120, 765985681152147456, 689598074880000, 6671808000, 5040, 1]

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

Content is available under The OEIS End-User License Agreement.