A121945 - cp's OEIS frontend

A121945 a(n) is the sum of the first n factorials in decreasing powers from n to 1. a(n) = Sum_{k = 1..n} k!^(n-k+1).

n	a(n)
1	1
2	3
3	11
4	69
5	929
6	30273
7	2591057
8	614059329
9	423463272449
10	907403624202753
11	6082394749206781697
12	140440480114401911810049
13	10845109029138237198786147329
14	3088811811740393517911301490890753
15	3220352134317904958924570965080200574977
16	12657255883388612328426763834234183884771442689

[1, 3, 11, 69, 929, 30273, 2591057, 614059329, 423463272449, 907403624202753, 6082394749206781697, 140440480114401911810049, 10845109029138237198786147329, 3088811811740393517911301490890753, 3220352134317904958924570965080200574977, 12657255883388612328426763834234183884771442689]

cp's OEIS Frontend

A121945 a(n) is the sum of the first n factorials in decreasing powers from n to 1. a(n) = Sum_{k = 1..n} k!^(n-k+1).

Table of values

List of values