A099624 - cp's OEIS frontend

A099624 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)3^(n-k-2)(4/3)^k.

n	a(n)
0	0
1	0
2	1
3	9
4	58
5	318
6	1591
7	7503
8	33976
9	149436
10	643261
11	2724357
12	11395654
13	47210154
14	194121811
15	793526571
16	3228811492
17	13090123272
18	52917410041
19	213437246145
20	859342367890
21	3455021317590
22	13875655896751
23	55677180731079

[0, 0, 1, 9, 58, 318, 1591, 7503, 33976, 149436, 643261, 2724357, 11395654, 47210154, 194121811, 793526571, 3228811492, 13090123272, 52917410041, 213437246145, 859342367890, 3455021317590, 13875655896751, 55677180731079]

cp's OEIS Frontend

A099624 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)3^(n-k-2)(4/3)^k.

Table of values

List of values

cp's OEIS Frontend

A099624 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)*3^(n-k-2)*(4/3)^k.

Table of values

List of values

A099624 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k+2)3^(n-k-2)(4/3)^k.