A263044 - cp's OEIS frontend

A263044 a(1) = a(2) = a(3) = 1; for n>3, a(n) = (a(n-3) + a(n-1))*(a(n-2) + a(n-3)).

n	a(n)
1	1
2	1
3	1
4	4
5	10
6	55
7	826
8	54340
9	47921995
10	2643710343286
11	126835535679488180710
12	335322495784116748418182251685105
13	42530809264656915340847577048392358554130713446770436

[1, 1, 1, 4, 10, 55, 826, 54340, 47921995, 2643710343286, 126835535679488180710, 335322495784116748418182251685105, 42530809264656915340847577048392358554130713446770436]

cp's OEIS Frontend

A263044 a(1) = a(2) = a(3) = 1; for n>3, a(n) = (a(n-3) + a(n-1))*(a(n-2) + a(n-3)).

Table of values

List of values