A372643 - cp's OEIS frontend

A372643 Number of defective (binary) heaps on n elements from the set {0,1} where exactly one ancestor-successor pair does not have the correct order.

n	a(n)
0	0
1	0
2	1
3	2
4	4
5	6
6	13
7	22
8	36
9	54
10	99
11	164
12	260
13	400
14	692
15	1146
16	1730
17	2638
18	4358
19	7148
20	10788
21	16716
22	27168
23	44692
24	65630
25	100736
26	159851
27	261156
28	385740
29	599704
30	946368
31	1551686
32	2245014
33	3455650
34	5364990
35	8743620
36	12757292
37	19869332
38	30818816
39	50429524

[0, 0, 1, 2, 4, 6, 13, 22, 36, 54, 99, 164, 260, 400, 692, 1146, 1730, 2638, 4358, 7148, 10788, 16716, 27168, 44692, 65630, 100736, 159851, 261156, 385740, 599704, 946368, 1551686, 2245014, 3455650, 5364990, 8743620, 12757292, 19869332, 30818816, 50429524]

cp's OEIS Frontend

A372643 Number of defective (binary) heaps on n elements from the set {0,1} where exactly one ancestor-successor pair does not have the correct order.

Table of values

List of values