A180234 - cp's OEIS frontend

A180234 Demi-tribonacci numbers (rounding down): a(0)=a(1)=0, a(2)=2; a(n) = floor( (a(n-1)+a(n-2)+a(n-3))/2 ).

n	a(n)
0	0
1	0
2	2
3	1
4	1
5	2
6	2
7	2
8	3
9	3
10	4
11	5
12	6
13	7
14	9
15	11
16	13
17	16
18	20
19	24
20	30
21	37
22	45
23	56
24	69
25	85
26	105
27	129
28	159
29	196
30	242
31	298
32	368
33	454
34	560
35	691
36	852
37	1051
38	1297
39	1600
40	1974
41	2435
42	3004
43	3706
44	4572
45	5641
46	6959
47	8586
48	10593
49	13069
50	16124
51	19893
52	24543
53	30280
54	37358
55	46090

[0, 0, 2, 1, 1, 2, 2, 2, 3, 3, 4, 5, 6, 7, 9, 11, 13, 16, 20, 24, 30, 37, 45, 56, 69, 85, 105, 129, 159, 196, 242, 298, 368, 454, 560, 691, 852, 1051, 1297, 1600, 1974, 2435, 3004, 3706, 4572, 5641, 6959, 8586, 10593, 13069, 16124, 19893, 24543, 30280, 37358, 46090]

cp's OEIS Frontend

A180234 Demi-tribonacci numbers (rounding down): a(0)=a(1)=0, a(2)=2; a(n) = floor( (a(n-1)+a(n-2)+a(n-3))/2 ).

Table of values

List of values