A317974 - cp's OEIS frontend

A317974 a(n) = 2*(a(n-1)+a(n-2)+a(n-3))-a(n-4) for n >= 4, with initial terms 0,0,1,1.

n	a(n)
0	0
1	0
2	1
3	1
4	4
5	12
6	33
7	97
8	280
9	808
10	2337
11	6753
12	19516
13	56404
14	163009
15	471105
16	1361520
17	3934864
18	11371969
19	32865601
20	94983348
21	274506972
22	793339873
23	2292794785
24	6626299912
25	19150362168
26	55345573857
27	159951677089
28	462268926316
29	1335981992356
30	3861059617665

[0, 0, 1, 1, 4, 12, 33, 97, 280, 808, 2337, 6753, 19516, 56404, 163009, 471105, 1361520, 3934864, 11371969, 32865601, 94983348, 274506972, 793339873, 2292794785, 6626299912, 19150362168, 55345573857, 159951677089, 462268926316, 1335981992356, 3861059617665]

cp's OEIS Frontend

A317974 a(n) = 2*(a(n-1)+a(n-2)+a(n-3))-a(n-4) for n >= 4, with initial terms 0,0,1,1.

Table of values

List of values