A024255 - cp's OEIS frontend

A024255 a(0)=0, a(n) = n*E(2n-1) for n >= 1, where E(n) = A000111(n) are the Euler (or up-down) numbers.

n	a(n)
0	0
1	1
2	4
3	48
4	1088
5	39680
6	2122752
7	156577792
8	15230058496
9	1888788086784
10	290888851128320
11	54466478584365056
12	12185086638082228224
13	3209979242472703787008
14	983522422455215438430208
15	346787762817143967622103040
16	139423404114002708738732982272

[0, 1, 4, 48, 1088, 39680, 2122752, 156577792, 15230058496, 1888788086784, 290888851128320, 54466478584365056, 12185086638082228224, 3209979242472703787008, 983522422455215438430208, 346787762817143967622103040, 139423404114002708738732982272]

cp's OEIS Frontend

A024255 a(0)=0, a(n) = n*E(2n-1) for n >= 1, where E(n) = A000111(n) are the Euler (or up-down) numbers.

Table of values

List of values