A374070 - cp's OEIS frontend

A374070 a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th composite or 0 if i = j.

n	a(n)
0	1
1	0
2	16
3	192
4	7056
5	296928
6	17353552
7	1288517448
8	123247560033
9	14559205069230
10	2068503986414344
11	350413573991639400
12	70216794936245622096
13	16348540980271313405736
14	4358673413318637872138056
15	1324443244518891911978887758
16	453726273130387432163560157389
17	173630294056619179637594095141048

[1, 0, 16, 192, 7056, 296928, 17353552, 1288517448, 123247560033, 14559205069230, 2068503986414344, 350413573991639400, 70216794936245622096, 16348540980271313405736, 4358673413318637872138056, 1324443244518891911978887758, 453726273130387432163560157389, 173630294056619179637594095141048]

cp's OEIS Frontend

A374070 a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th composite or 0 if i = j.

Table of values

List of values