A374069 - cp's OEIS frontend

A374069 a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th composite or 1 if i = j.

n	a(n)
0	1
1	1
2	17
3	261
4	8393
5	356618
6	20355656
7	1498310848
8	141920467648
9	16632516446720
10	2345863766165536
11	394823892589979472
12	78653652638945445776
13	18216229760067802231488
14	4833321599094565894295552
15	1462259517864407783009737728
16	498935238969900279377677930496
17	190227655207141695023381769820864

[1, 1, 17, 261, 8393, 356618, 20355656, 1498310848, 141920467648, 16632516446720, 2345863766165536, 394823892589979472, 78653652638945445776, 18216229760067802231488, 4833321599094565894295552, 1462259517864407783009737728, 498935238969900279377677930496, 190227655207141695023381769820864]

cp's OEIS Frontend

A374069 a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th composite or 1 if i = j.

Table of values

List of values