A089499 - cp's OEIS frontend

A089499 a(0)=0; a(1)=1; a(2n) = 4*Sum_{k=0..n} a(2k-1); a(2n+1) = a(2n) + a(2n-1).

n	a(n)
0	0
1	1
2	4
3	5
4	24
5	29
6	140
7	169
8	816
9	985
10	4756
11	5741
12	27720
13	33461
14	161564
15	195025
16	941664
17	1136689
18	5488420
19	6625109
20	31988856
21	38613965
22	186444716
23	225058681
24	1086679440
25	1311738121
26	6333631924
27	7645370045
28	36915112104
29	44560482149

[0, 1, 4, 5, 24, 29, 140, 169, 816, 985, 4756, 5741, 27720, 33461, 161564, 195025, 941664, 1136689, 5488420, 6625109, 31988856, 38613965, 186444716, 225058681, 1086679440, 1311738121, 6333631924, 7645370045, 36915112104, 44560482149]

cp's OEIS Frontend

A089499 a(0)=0; a(1)=1; a(2n) = 4*Sum_{k=0..n} a(2k-1); a(2n+1) = a(2n) + a(2n-1).

Table of values

List of values