A208655 - cp's OEIS frontend

A208655 Number of palindromic paths starting with 1 through the subset array of {1,2,...,n}; see Comments.

n	a(n)
1	1
2	1
3	6
4	36
5	2400
6	90000
7	55566000
8	13553164800
9	72267023646720
10	117595223746560000
11	5219033393851200000000
12	57636380373471744768000000
13	20810790197418148654769602560000
14	1578992018570629416640340512656998400

[1, 1, 6, 36, 2400, 90000, 55566000, 13553164800, 72267023646720, 117595223746560000, 5219033393851200000000, 57636380373471744768000000, 20810790197418148654769602560000, 1578992018570629416640340512656998400]

cp's OEIS Frontend

A208655 Number of palindromic paths starting with 1 through the subset array of {1,2,...,n}; see Comments.

Table of values

List of values