A216281 - cp's OEIS frontend

A216281 Sum of n-th derivatives at x=1 of all functions that are representable as x^x^...^x with n x's and parentheses inserted in all possible ways.

n	a(n)
1	1
2	2
3	21
4	392
5	11980
6	471966
7	24655820
8	1548264752
9	118039822488
10	10482116888640
11	1076582148812808
12	125439212178037728
13	16473767684928836256
14	2410412979008498588208
15	390793360308270931979400
16	69716064087131957637475968

[1, 2, 21, 392, 11980, 471966, 24655820, 1548264752, 118039822488, 10482116888640, 1076582148812808, 125439212178037728, 16473767684928836256, 2410412979008498588208, 390793360308270931979400, 69716064087131957637475968]

cp's OEIS Frontend

A216281 Sum of n-th derivatives at x=1 of all functions that are representable as x^x^...^x with n x's and parentheses inserted in all possible ways.

Table of values

List of values