A277381 - cp's OEIS frontend

A277381 a(n) = exp(-1) * Sum_{k>=0} H_n(k)/k!, where H_n(x) is n-th Hermite polynomial.

n	a(n)
0	1
1	2
2	6
3	28
4	156
5	984
6	7112
7	57488
8	508688
9	4887840
10	50639200
11	561416640
12	6621963712
13	82719611264
14	1089925195904
15	15094182365440
16	219035852333312
17	3321573144437248
18	52511336993334784
19	863594855161338880
20	14746060593172585472
21	260971042697438779392

[1, 2, 6, 28, 156, 984, 7112, 57488, 508688, 4887840, 50639200, 561416640, 6621963712, 82719611264, 1089925195904, 15094182365440, 219035852333312, 3321573144437248, 52511336993334784, 863594855161338880, 14746060593172585472, 260971042697438779392]

cp's OEIS Frontend

A277381 a(n) = exp(-1) * Sum_{k>=0} H_n(k)/k!, where H_n(x) is n-th Hermite polynomial.

Table of values

List of values