A277585 - cp's OEIS frontend

A277585 Denominator of Sum_{k=0..n} (2^k * (k!)^2)/(2k + 1)!.

n	a(n)
0	1
1	3
2	15
3	21
4	315
5	3465
6	45045
7	15015
8	765765
9	14549535
10	14549535
11	25741485
12	1673196525
13	1003917915
14	145568097675
15	265447707525
16	1504203675975
17	4512611027925
18	166966608033225
19	33393321606645
20	1369126185872445
21	58872425992515135
22	294362129962575675

[1, 3, 15, 21, 315, 3465, 45045, 15015, 765765, 14549535, 14549535, 25741485, 1673196525, 1003917915, 145568097675, 265447707525, 1504203675975, 4512611027925, 166966608033225, 33393321606645, 1369126185872445, 58872425992515135, 294362129962575675]

cp's OEIS Frontend

A277585 Denominator of Sum_{k=0..n} (2^k * (k!)^2)/(2k + 1)!.

Table of values

List of values