A298409 - cp's OEIS frontend

A298409 a(n) = 2a(n-1) - a(n-3) + 2a(floor(n/2)) + 3a(floor(n/3)) + ... + na(floor(n/n)), where a(0) = 1, a(1) = 2, a(2) = 3.

n	a(n)
0	1
1	2
2	3
3	15
4	48
5	123
6	300
7	635
8	1316
9	2555
10	4873
11	8850
12	16096
13	28296
14	49424
15	84749
16	144733
17	243607
18	409156
19	680308
20	1128889
21	1861633
22	3063978
23	5020133
24	8217296
25	13409702
26	21862824
27	35575784
28	57853195
29	93954953
30	152524643
31	247386674
32	401132014
33	650065133

[1, 2, 3, 15, 48, 123, 300, 635, 1316, 2555, 4873, 8850, 16096, 28296, 49424, 84749, 144733, 243607, 409156, 680308, 1128889, 1861633, 3063978, 5020133, 8217296, 13409702, 21862824, 35575784, 57853195, 93954953, 152524643, 247386674, 401132014, 650065133]

cp's OEIS Frontend

A298409 a(n) = 2a(n-1) - a(n-3) + 2a(floor(n/2)) + 3a(floor(n/3)) + ... + na(floor(n/n)), where a(0) = 1, a(1) = 2, a(2) = 3.

Table of values

List of values

cp's OEIS Frontend

A298409 a(n) = 2*a(n-1) - a(n-3) + 2*a(floor(n/2)) + 3*a(floor(n/3)) + ... + n*a(floor(n/n)), where a(0) = 1, a(1) = 2, a(2) = 3.

Table of values

List of values

A298409 a(n) = 2a(n-1) - a(n-3) + 2a(floor(n/2)) + 3a(floor(n/3)) + ... + na(floor(n/n)), where a(0) = 1, a(1) = 2, a(2) = 3.