A074475 - cp's OEIS frontend

A074475 a(n) = Sum_{j=0..floor(n/2)} T(2j + q), where T(n) are generalized tribonacci numbers (A001644) and q = n - 2floor(n/2).

n	a(n)
0	3
1	1
2	6
3	8
4	17
5	29
6	56
7	100
8	187
9	341
10	630
11	1156
12	2129
13	3913
14	7200
15	13240
16	24355
17	44793
18	82390
19	151536
20	278721
21	512645
22	942904
23	1734268
24	3189819
25	5866989
26	10791078
27	19847884
28	36505953
29	67144913
30	123498752
31	227149616
32	417793283

[3, 1, 6, 8, 17, 29, 56, 100, 187, 341, 630, 1156, 2129, 3913, 7200, 13240, 24355, 44793, 82390, 151536, 278721, 512645, 942904, 1734268, 3189819, 5866989, 10791078, 19847884, 36505953, 67144913, 123498752, 227149616, 417793283]

cp's OEIS Frontend

A074475 a(n) = Sum_{j=0..floor(n/2)} T(2j + q), where T(n) are generalized tribonacci numbers (A001644) and q = n - 2floor(n/2).

Table of values

List of values

cp's OEIS Frontend

A074475 a(n) = Sum_{j=0..floor(n/2)} T(2*j + q), where T(n) are generalized tribonacci numbers (A001644) and q = n - 2*floor(n/2).

Table of values

List of values

A074475 a(n) = Sum_{j=0..floor(n/2)} T(2j + q), where T(n) are generalized tribonacci numbers (A001644) and q = n - 2floor(n/2).