A341598 - cp's OEIS frontend

A341598 a(n) = Sum_{k=n..2n} |Stirling1(2n, k)| * Stirling1(k, n).

n	a(n)
0	1
1	0
2	4
3	15
4	728
5	9660
6	454333
7	11921910
8	620800752
9	25052417676
10	1495629968820
11	81260657073596
12	5594820193907943
13	379090865741895580
14	29938401724408721880
15	2414113646907092768775
16	216602054576835471646080
17	20165486015516015341186800
18	2034029167741961519973600460

[1, 0, 4, 15, 728, 9660, 454333, 11921910, 620800752, 25052417676, 1495629968820, 81260657073596, 5594820193907943, 379090865741895580, 29938401724408721880, 2414113646907092768775, 216602054576835471646080, 20165486015516015341186800, 2034029167741961519973600460]

cp's OEIS Frontend

A341598 a(n) = Sum_{k=n..2n} |Stirling1(2n, k)| * Stirling1(k, n).

Table of values

List of values

cp's OEIS Frontend

A341598 a(n) = Sum_{k=n..2*n} |Stirling1(2*n, k)| * Stirling1(k, n).

Table of values

List of values

A341598 a(n) = Sum_{k=n..2n} |Stirling1(2n, k)| * Stirling1(k, n).