A099625 - cp's OEIS frontend

A099625 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)2^(n-k-2)(1/2)^k.

n	a(n)
0	0
1	0
2	1
3	6
4	25
5	88
6	281
7	842
8	2413
9	6692
10	18101
11	48014
12	125393
13	323376
14	825393
15	2088850
16	5248853
17	13110844
18	32584653
19	80639446
20	198844281
21	488813768
22	1198491913
23	2931934938
24	7158830781
25	17450923092
26	42480107365
27	103283553054
28	250859152801
29	608759955040
30	1476163691105

[0, 0, 1, 6, 25, 88, 281, 842, 2413, 6692, 18101, 48014, 125393, 323376, 825393, 2088850, 5248853, 13110844, 32584653, 80639446, 198844281, 488813768, 1198491913, 2931934938, 7158830781, 17450923092, 42480107365, 103283553054, 250859152801, 608759955040, 1476163691105]

cp's OEIS Frontend

A099625 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)2^(n-k-2)(1/2)^k.

Table of values

List of values

cp's OEIS Frontend

A099625 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)*2^(n-k-2)*(1/2)^k.

Table of values

List of values

A099625 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)2^(n-k-2)(1/2)^k.