A228884 - cp's OEIS frontend

A228884 Determinant of the n X n matrix with (i,j)-entry equal to the greatest common divisor of i-j and n.

n	a(n)
0	1
1	1
2	3
3	20
4	128
5	2304
6	10800
7	606528
8	3932160
9	141087744
10	1289945088
11	210000000000
12	335544320000
13	222902511206400
14	804545281732608
15	39137889484800000
16	972777519512027136
17	608742554432415203328
18	391804906912468697088
19	1455817098785971890290688
20	968232702940866945220608

[1, 1, 3, 20, 128, 2304, 10800, 606528, 3932160, 141087744, 1289945088, 210000000000, 335544320000, 222902511206400, 804545281732608, 39137889484800000, 972777519512027136, 608742554432415203328, 391804906912468697088, 1455817098785971890290688, 968232702940866945220608]

cp's OEIS Frontend

A228884 Determinant of the n X n matrix with (i,j)-entry equal to the greatest common divisor of i-j and n.

Table of values

List of values