A377662 - cp's OEIS frontend

A377662 a(n) = Sum_{k=0..n} binomial(n, k) * Sum_{j=k..n} n!/(k!*(j - k)!). Row sums of A377661.

n	a(n)
0	1
1	3
2	14
3	80
4	534
5	4102
6	35916
7	354888
8	3915750
9	47754938
10	637840356
11	9256590928
12	144977618044
13	2436460447020
14	43719637179224
15	834042701945520
16	16852447379512710
17	359468276129261730
18	8070500634880125300
19	190211302604157871680
20	4695001374741310892820

[1, 3, 14, 80, 534, 4102, 35916, 354888, 3915750, 47754938, 637840356, 9256590928, 144977618044, 2436460447020, 43719637179224, 834042701945520, 16852447379512710, 359468276129261730, 8070500634880125300, 190211302604157871680, 4695001374741310892820]

cp's OEIS Frontend

A377662 a(n) = Sum_{k=0..n} binomial(n, k) * Sum_{j=k..n} n!/(k!*(j - k)!). Row sums of A377661.

Table of values

List of values