A339807 - cp's OEIS frontend

A339807 Irregular triangle read by rows: T(n,k) (n>=2, k>=1) is the number of strong digraphs on n nodes with k descents.

n	a(n)
2	1
3	2
4	11
5	5
6	10
7	154
8	540
9	581
10	272
11	49
12	122
13	3418
14	27304
15	90277
16	150948
17	150519
18	95088
19	37797
20	8714
21	893
22	3346
23	142760
24	1938178
25	12186976
26	42696630
27	94605036
28	145009210
29	161845163
30	134933733
31	84656743
32	39632149
33	13481441
34	3156845
35	455917
36	30649

[1, 2, 11, 5, 10, 154, 540, 581, 272, 49, 122, 3418, 27304, 90277, 150948, 150519, 95088, 37797, 8714, 893, 3346, 142760, 1938178, 12186976, 42696630, 94605036, 145009210, 161845163, 134933733, 84656743, 39632149, 13481441, 3156845, 455917, 30649]

cp's OEIS Frontend

A339807 Irregular triangle read by rows: T(n,k) (n>=2, k>=1) is the number of strong digraphs on n nodes with k descents.

Table of values

List of values