A138897 - cp's OEIS frontend

A138897 Ratio of (2n-1)! to number of zeros in upper part of Sylvester matrix of polynomial of degree n with all nonzero coefficients.

n	a(n)
2	3
3	20
4	420
5	18144
6	1330560
7	148262400
8	23351328000
9	4940103168000
10	1351612226764800
11	464463110651904000
12	195848611658219520000
13	99430833611096064000000
14	59828953024276660224000000
15	42103628541617628354969600000
16	34261827725741345073856512000000
17	31923961833867229762934538240000000

[3, 20, 420, 18144, 1330560, 148262400, 23351328000, 4940103168000, 1351612226764800, 464463110651904000, 195848611658219520000, 99430833611096064000000, 59828953024276660224000000, 42103628541617628354969600000, 34261827725741345073856512000000, 31923961833867229762934538240000000]

cp's OEIS Frontend

A138897 Ratio of (2n-1)! to number of zeros in upper part of Sylvester matrix of polynomial of degree n with all nonzero coefficients.

Table of values

List of values