A303001 - cp's OEIS frontend

A303001 a(n) = permanent of the n X n matrix with entries a(i, i) = i*(i+1)/2 and a(i, j) = 1 elsewhere.

n	a(n)
1	1
2	4
3	30
4	356
5	6106
6	142760
7	4363848
8	168986136
9	8087082144
10	468807362736
11	32379640476000
12	2627735592279600
13	247610398718738640
14	26815386224063189760
15	3307855985755600598400
16	461149884030679844958720
17	72151124506962747825006720
18	12590610689213961622942752000

[1, 4, 30, 356, 6106, 142760, 4363848, 168986136, 8087082144, 468807362736, 32379640476000, 2627735592279600, 247610398718738640, 26815386224063189760, 3307855985755600598400, 461149884030679844958720, 72151124506962747825006720, 12590610689213961622942752000]

cp's OEIS Frontend

A303001 a(n) = permanent of the n X n matrix with entries a(i, i) = i*(i+1)/2 and a(i, j) = 1 elsewhere.

Table of values

List of values