A354735 - cp's OEIS frontend

A354735 a(0) = a(1) = 1; a(n) = 4 * Sum_{k=0..n-2} a(k) * a(n-k-2).

n	a(n)
0	1
1	1
2	4
3	8
4	36
5	96
6	416
7	1312
8	5504
9	19200
10	79168
11	293888
12	1203712
13	4648448
14	19027968
15	75411456
16	309487616
17	1248411648
18	5144133632
19	21011775488
20	86971449344
21	358540509184
22	1490753372160
23	6189315784704
24	25843660619776
25	107902536122368
26	452308820819968
27	1897178275512320

[1, 1, 4, 8, 36, 96, 416, 1312, 5504, 19200, 79168, 293888, 1203712, 4648448, 19027968, 75411456, 309487616, 1248411648, 5144133632, 21011775488, 86971449344, 358540509184, 1490753372160, 6189315784704, 25843660619776, 107902536122368, 452308820819968, 1897178275512320]

cp's OEIS Frontend

A354735 a(0) = a(1) = 1; a(n) = 4 * Sum_{k=0..n-2} a(k) * a(n-k-2).

Table of values

List of values