A331491 - cp's OEIS frontend

A331491 a(n) is the permanent of a 2n X 2n antisymmetric Toeplitz matrix M(2n) whose first row consists of a single zero followed by successive positive integers repeated (A004526).

n	a(n)
0	1
1	-1
2	8
3	-965
4	301864
5	-276973609
6	529706205072
7	-1976989515848629
8	12817424808315680000
9	-136266429300554940901097
10	2240244443768853657066332152
11	-54675928167021488863788002983045
12	1910142516402733768189592370043464696
13	-92787876901046051283841308281722409846473

[1, -1, 8, -965, 301864, -276973609, 529706205072, -1976989515848629, 12817424808315680000, -136266429300554940901097, 2240244443768853657066332152, -54675928167021488863788002983045, 1910142516402733768189592370043464696, -92787876901046051283841308281722409846473]

cp's OEIS Frontend

A331491 a(n) is the permanent of a 2n X 2n antisymmetric Toeplitz matrix M(2n) whose first row consists of a single zero followed by successive positive integers repeated (A004526).

Table of values

List of values