A277586 - cp's OEIS frontend

A277586 Numerator of Sum_{k=0..n} (2^k * (k!)^2)/(2k + 1)!.

n	a(n)
0	1
1	4
2	22
3	32
4	488
5	5408
6	70544
7	23552
8	1202048
9	22846976
10	22850816
11	40431616
12	2628156416
13	1576923136
14	228655904768
15	416962576384
16	2362792902656
17	7088385949696
18	262270410489856
19	52454094798848
20	2150618140770304
21	92476585387491328
22	462382939977023488

[1, 4, 22, 32, 488, 5408, 70544, 23552, 1202048, 22846976, 22850816, 40431616, 2628156416, 1576923136, 228655904768, 416962576384, 2362792902656, 7088385949696, 262270410489856, 52454094798848, 2150618140770304, 92476585387491328, 462382939977023488]

cp's OEIS Frontend

A277586 Numerator of Sum_{k=0..n} (2^k * (k!)^2)/(2k + 1)!.

Table of values

List of values