A306739 - cp's OEIS frontend

A306739 n-th derivative of f_{n+1} at x=1, where 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.

n	a(n)
0	1
1	1
2	4
3	9
4	156
5	650
6	5034
7	26054
8	4270304
9	27617616
10	198832320
11	6251899104
12	46466835072
13	5033625978576
14	37552294300416
15	793996577407560
16	6563364026374464
17	13221301266369115200
18	114481557932032050048
19	1114510139284499182656
20	109640692903857698897280

[1, 1, 4, 9, 156, 650, 5034, 26054, 4270304, 27617616, 198832320, 6251899104, 46466835072, 5033625978576, 37552294300416, 793996577407560, 6563364026374464, 13221301266369115200, 114481557932032050048, 1114510139284499182656, 109640692903857698897280]

cp's OEIS Frontend

A306739 n-th derivative of f_{n+1} at x=1, where 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.

Table of values

List of values