A306393 - cp's OEIS frontend

A306393 Number T(n,k) of defective (binary) heaps on n elements where k ancestor-successor pairs do not have the correct order; triangle T(n,k), n >= 0, 0 <= k <= A061168(n), read by rows.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	3
8	6
9	6
10	6
11	3
12	8
13	16
14	24
15	24
16	24
17	16
18	8
19	20
20	60
21	100
22	120
23	120
24	120
25	100
26	60
27	20
28	80
29	240
30	480
31	640
32	720
33	720
34	720
35	640
36	480
37	240
38	80
39	210
40	840
41	1890
42	3150
43	4200
44	4830
45	5040
46	5040
47	4830
48	4200
49	3150
50	1890
51	840
52	210

[1, 1, 1, 1, 2, 2, 2, 3, 6, 6, 6, 3, 8, 16, 24, 24, 24, 16, 8, 20, 60, 100, 120, 120, 120, 100, 60, 20, 80, 240, 480, 640, 720, 720, 720, 640, 480, 240, 80, 210, 840, 1890, 3150, 4200, 4830, 5040, 5040, 4830, 4200, 3150, 1890, 840, 210]

cp's OEIS Frontend

A306393 Number T(n,k) of defective (binary) heaps on n elements where k ancestor-successor pairs do not have the correct order; triangle T(n,k), n >= 0, 0 <= k <= A061168(n), read by rows.

Table of values

List of values