A099622 - cp's OEIS frontend

A099622 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k, k-1)4^(n-k-1)(5/4)^k.

n	a(n)
0	0
1	1
2	8
3	53
4	316
5	1785
6	9744
7	51997
8	273092
9	1417889
10	7299160
11	37334661
12	190028748
13	963565513
14	4871514656
15	24572321645
16	123720601684
17	622038982257
18	3123938806632
19	15674669614549
20	78593250398300
21	393845861293721

[0, 1, 8, 53, 316, 1785, 9744, 51997, 273092, 1417889, 7299160, 37334661, 190028748, 963565513, 4871514656, 24572321645, 123720601684, 622038982257, 3123938806632, 15674669614549, 78593250398300, 393845861293721]

cp's OEIS Frontend

A099622 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k, k-1)4^(n-k-1)(5/4)^k.

Table of values

List of values

cp's OEIS Frontend

A099622 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k, k-1)*4^(n-k-1)*(5/4)^k.

Table of values

List of values

A099622 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k, k-1)4^(n-k-1)(5/4)^k.