A144513 - cp's OEIS frontend

A144513 a(n) = Sum_{k=0..n} (n+k+2)!/((n-k)!k!2^k).

n	a(n)
0	2
1	18
2	162
3	1670
4	19980
5	274932
6	4296278
7	75324762
8	1466031690
9	31386435410
10	733391707752
11	18578222154648
12	507246285802802
13	14851746921266010
14	464244744007818090
15	15431886798641124662
16	543593886328031841828
17	20228083875146926867932
18	792934721766833544369830

[2, 18, 162, 1670, 19980, 274932, 4296278, 75324762, 1466031690, 31386435410, 733391707752, 18578222154648, 507246285802802, 14851746921266010, 464244744007818090, 15431886798641124662, 543593886328031841828, 20228083875146926867932, 792934721766833544369830]

cp's OEIS Frontend

A144513 a(n) = Sum_{k=0..n} (n+k+2)!/((n-k)!k!2^k).

Table of values

List of values

cp's OEIS Frontend

A144513 a(n) = Sum_{k=0..n} (n+k+2)!/((n-k)!*k!*2^k).

Table of values

List of values

A144513 a(n) = Sum_{k=0..n} (n+k+2)!/((n-k)!k!2^k).