A374437 - cp's OEIS frontend

A374437 a(n) = [1 - (n + s)/2]_n * [1 - (n - s)/2]_n, where s = sqrt(-n*(2 + n)) and [x]_n is the Pochhammer function.

n	a(n)
0	1
1	1
2	6
3	96
4	2940
5	147015
6	10902528
7	1124057088
8	153811768320
9	26974095778125
10	5899429878170400
11	1574248324943314944
12	503433848781210320064
13	190069012187712441058275
14	83650190971694738227200000
15	42450063041684340146700288000
16	24606022217067172854917986516992

[1, 1, 6, 96, 2940, 147015, 10902528, 1124057088, 153811768320, 26974095778125, 5899429878170400, 1574248324943314944, 503433848781210320064, 190069012187712441058275, 83650190971694738227200000, 42450063041684340146700288000, 24606022217067172854917986516992]

cp's OEIS Frontend

A374437 a(n) = [1 - (n + s)/2]_n * [1 - (n - s)/2]_n, where s = sqrt(-n*(2 + n)) and [x]_n is the Pochhammer function.

Table of values

List of values