A141683 - cp's OEIS frontend

A141683 a(n) = Sum_{k=1..n} b(k)*a(n - k) for n >= 1, where b(n) = b(n-2) + b(n-3) for n >= 3 with b(0) = 0 and b(1) = b(2) = 1.

n	a(n)
1	1
2	1
3	2
4	4
5	9
6	19
7	41
8	88
9	189
10	406
11	872
12	1873
13	4023
14	8641
15	18560
16	39865
17	85626
18	183916
19	395033
20	848491
21	1822473
22	3914488
23	8407925
24	18059374
25	38789712
26	83316385
27	178955183
28	384377665
29	825604416
30	1773314929
31	3808901426

[1, 1, 2, 4, 9, 19, 41, 88, 189, 406, 872, 1873, 4023, 8641, 18560, 39865, 85626, 183916, 395033, 848491, 1822473, 3914488, 8407925, 18059374, 38789712, 83316385, 178955183, 384377665, 825604416, 1773314929, 3808901426]

cp's OEIS Frontend

A141683 a(n) = Sum_{k=1..n} b(k)*a(n - k) for n >= 1, where b(n) = b(n-2) + b(n-3) for n >= 3 with b(0) = 0 and b(1) = b(2) = 1.

Table of values

List of values