cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A110209 1 + sum of first n 3-almost primes.

Table of values

n a(n)
0 1
1 9
2 21
3 39
4 59
5 86
6 114
7 144
8 186
9 230
10 275
11 325
12 377
13 440
14 506
15 574
16 644
17 719
18 795
19 873
20 965
21 1063
22 1162
23 1264
24 1369
25 1479
26 1593
27 1709
28 1826
29 1950
30 2075
31 2205
32 2343
33 2490
34 2638
35 2791
36 2945
37 3109
38 3274
39 3444
40 3615
41 3787
42 3961
43 4136
44 4318
45 4504
46 4692

List of values

[1, 9, 21, 39, 59, 86, 114, 144, 186, 230, 275, 325, 377, 440, 506, 574, 644, 719, 795, 873, 965, 1063, 1162, 1264, 1369, 1479, 1593, 1709, 1826, 1950, 2075, 2205, 2343, 2490, 2638, 2791, 2945, 3109, 3274, 3444, 3615, 3787, 3961, 4136, 4318, 4504, 4692]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.