A103142 - cp's OEIS frontend

A103142 a(n) = 2*a(n-1) + a(n-2) + a(n-3) + a(n-4), with a(0)=1, a(1)=2, a(3)=5, a(4)=13.

n	a(n)
0	1
1	2
2	5
3	13
4	34
5	88
6	228
7	591
8	1532
9	3971
10	10293
11	26680
12	69156
13	179256
14	464641
15	1204374
16	3121801
17	8091873
18	20974562
19	54367172
20	140922580
21	365278767
22	946821848
23	2454212215
24	6361447625
25	16489208080
26	42740897848
27	110786663616
28	287164880785
29	744346531114

[1, 2, 5, 13, 34, 88, 228, 591, 1532, 3971, 10293, 26680, 69156, 179256, 464641, 1204374, 3121801, 8091873, 20974562, 54367172, 140922580, 365278767, 946821848, 2454212215, 6361447625, 16489208080, 42740897848, 110786663616, 287164880785, 744346531114]

cp's OEIS Frontend

A103142 a(n) = 2*a(n-1) + a(n-2) + a(n-3) + a(n-4), with a(0)=1, a(1)=2, a(3)=5, a(4)=13.

Table of values

List of values