A264100 - cp's OEIS frontend

A264100 Sum of the lengths of the arithmetic progressions in {1,2,3,...,n}, including trivial arithmetic progressions of lengths 1 and 2.

n	a(n)
0	0
1	1
2	4
3	12
4	26
5	50
6	82
7	130
8	188
9	265
10	358
11	473
12	602
13	765
14	944
15	1151
16	1386
17	1657
18	1948
19	2284
20	2642
21	3048
22	3490
23	3972
24	4480
25	5056
26	5666
27	6322
28	7022
29	7784
30	8578
31	9452
32	10360
33	11337
34	12366
35	13453
36	14592
37	15831
38	17110
39	18453
40	19856
41	21357
42	22902
43	24551

[0, 1, 4, 12, 26, 50, 82, 130, 188, 265, 358, 473, 602, 765, 944, 1151, 1386, 1657, 1948, 2284, 2642, 3048, 3490, 3972, 4480, 5056, 5666, 6322, 7022, 7784, 8578, 9452, 10360, 11337, 12366, 13453, 14592, 15831, 17110, 18453, 19856, 21357, 22902, 24551]

cp's OEIS Frontend

A264100 Sum of the lengths of the arithmetic progressions in {1,2,3,...,n}, including trivial arithmetic progressions of lengths 1 and 2.

Table of values

List of values