A099528 - cp's OEIS frontend

A099528 Row sums of triangle A099527, so that a(n) = Sum_{k=0..n} coefficient of z^k in (2 + 3*z + z^2)^(n-[k/2]), where [k/2] is the integer floor of k/2.

n	a(n)
0	1
1	5
2	17
3	63
4	242
5	922
6	3502
7	13311
8	50608
9	192398
10	731429
11	2780649
12	10571120
13	40187929
14	152781292
15	580824261
16	2208102985
17	8394481949
18	31913061839
19	121322974122
20	461230079570
21	1753445197282
22	6666022438759
23	25342026784200

[1, 5, 17, 63, 242, 922, 3502, 13311, 50608, 192398, 731429, 2780649, 10571120, 40187929, 152781292, 580824261, 2208102985, 8394481949, 31913061839, 121322974122, 461230079570, 1753445197282, 6666022438759, 25342026784200]

cp's OEIS Frontend

A099528 Row sums of triangle A099527, so that a(n) = Sum_{k=0..n} coefficient of z^k in (2 + 3*z + z^2)^(n-[k/2]), where [k/2] is the integer floor of k/2.

Table of values

List of values