A124502 - cp's OEIS frontend

A124502 a(1)=a(2)=1; thereafter, a(n+1) = a(n) + a(n-1) + 1 if n is a multiple of 5, otherwise a(n+1) = a(n) + a(n-1).

n	a(n)
1	1
2	1
3	2
4	3
5	5
6	9
7	14
8	23
9	37
10	60
11	98
12	158
13	256
14	414
15	670
16	1085
17	1755
18	2840
19	4595
20	7435
21	12031
22	19466
23	31497
24	50963
25	82460
26	133424
27	215884
28	349308
29	565192
30	914500
31	1479693
32	2394193
33	3873886
34	6268079
35	10141965
36	16410045
37	26552010
38	42962055
39	69514065
40	112476120

[1, 1, 2, 3, 5, 9, 14, 23, 37, 60, 98, 158, 256, 414, 670, 1085, 1755, 2840, 4595, 7435, 12031, 19466, 31497, 50963, 82460, 133424, 215884, 349308, 565192, 914500, 1479693, 2394193, 3873886, 6268079, 10141965, 16410045, 26552010, 42962055, 69514065, 112476120]

cp's OEIS Frontend

A124502 a(1)=a(2)=1; thereafter, a(n+1) = a(n) + a(n-1) + 1 if n is a multiple of 5, otherwise a(n+1) = a(n) + a(n-1).

Table of values

List of values