A215703 - cp's OEIS frontend

A215703 A(n,k) is the n-th derivative of f_k at x=1, and f_k is the k-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways; square array A(n,k), n>=0, k>=1, read by antidiagonals.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	0
6	1
7	1
8	2
9	0
10	1
11	1
12	4
13	3
14	0
15	1
16	1
17	2
18	12
19	8
20	0
21	1
22	1
23	6
24	9
25	52
26	10
27	0
28	1
29	1
30	4
31	27
32	32
33	240
34	54
35	0
36	1
37	1
38	2
39	18
40	156
41	180
42	1188
43	-42
44	0
45	1
46	1
47	2
48	15
49	100
50	1110
51	954
52	6804
53	944
54	0
55	1
56	1
57	8
58	9
59	80
60	650
61	8322
62	6524
63	38960
64	-5112
65	0
66	1
67	1
68	6
69	48
70	56
71	590
72	4908
73	70098
74	45016
75	253296
76	47160
77	0

[1, 1, 1, 1, 1, 0, 1, 1, 2, 0, 1, 1, 4, 3, 0, 1, 1, 2, 12, 8, 0, 1, 1, 6, 9, 52, 10, 0, 1, 1, 4, 27, 32, 240, 54, 0, 1, 1, 2, 18, 156, 180, 1188, -42, 0, 1, 1, 2, 15, 100, 1110, 954, 6804, 944, 0, 1, 1, 8, 9, 80, 650, 8322, 6524, 38960, -5112, 0, 1, 1, 6, 48, 56, 590, 4908, 70098, 45016, 253296, 47160, 0]

cp's OEIS Frontend

A215703 A(n,k) is the n-th derivative of f_k at x=1, and f_k is the k-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways; square array A(n,k), n>=0, k>=1, read by antidiagonals.

Table of values

List of values