A337154 - cp's OEIS frontend

A337154 a(n) = 4^n * (n!)^2 * Sum_{k=0..n} 1 / ((-4)^k * (k!)^2).

n	a(n)
0	1
1	3
2	49
3	1763
4	112833
5	11283299
6	1624795057
7	318459831171
8	81525716779777
9	26414332236647747
10	10565732894659098801
11	5113814721015003819683
12	2945557279304642200137409
13	1991196720809938127292888483
14	1561098229114991491797624570673
15	1404988406203492342617862113605699

[1, 3, 49, 1763, 112833, 11283299, 1624795057, 318459831171, 81525716779777, 26414332236647747, 10565732894659098801, 5113814721015003819683, 2945557279304642200137409, 1991196720809938127292888483, 1561098229114991491797624570673, 1404988406203492342617862113605699]

cp's OEIS Frontend

A337154 a(n) = 4^n * (n!)^2 * Sum_{k=0..n} 1 / ((-4)^k * (k!)^2).

Table of values

List of values