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.

A033497 a(n) = 2*a(n-1) + a(floor(n/2)), with a(1) = 1, a(2) = 2, a(3) = 4.

Table of values

n a(n)
1 1
2 2
3 4
4 10
5 22
6 48
7 100
8 210
9 430
10 882
11 1786
12 3620
13 7288
14 14676
15 29452
16 59114
17 118438
18 237306
19 475042
20 950966
21 1902814
22 3807414
23 7616614
24 15236848
25 30477316
26 60961920
27 121931128
28 243876932
29 487768540
30 975566532
31 1951162516
32 3902384146
33 7804827406
34 15609773250

List of values

[1, 2, 4, 10, 22, 48, 100, 210, 430, 882, 1786, 3620, 7288, 14676, 29452, 59114, 118438, 237306, 475042, 950966, 1902814, 3807414, 7616614, 15236848, 30477316, 60961920, 121931128, 243876932, 487768540, 975566532, 1951162516, 3902384146, 7804827406, 15609773250]

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

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