A247368 - cp's OEIS frontend

A247368 a(n) = (a(n-1) * a(n-3) - (-1)^n * a(n-2)^2) / a(n-4) with a(0) = 0, a(1) = ... = a(4) = 1.

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	2
6	1
7	5
8	9
9	17
10	4
11	65
12	121
13	277
14	841
15	2746
16	441
17	28561
18	93025
19	312001
20	583696
21	5309441
22	14145121
23	116815697
24	719795241
25	4487760170
26	433763929
27	175081030037
28	1091329140889
29	6935920173025
30	53828252727076
31	610296440614897
32	1223724862004841

[0, 1, 1, 1, 1, 2, 1, 5, 9, 17, 4, 65, 121, 277, 841, 2746, 441, 28561, 93025, 312001, 583696, 5309441, 14145121, 116815697, 719795241, 4487760170, 433763929, 175081030037, 1091329140889, 6935920173025, 53828252727076, 610296440614897, 1223724862004841]

cp's OEIS Frontend

A247368 a(n) = (a(n-1) * a(n-3) - (-1)^n * a(n-2)^2) / a(n-4) with a(0) = 0, a(1) = ... = a(4) = 1.

Table of values

List of values