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.

A036557 Number of multiples of 3 in 0..2^n-1 with an even sum of base-2 digits.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 6
5 10
6 20
7 35
8 70
9 126
10 252
11 463
12 926
13 1730
14 3460
15 6555
16 13110
17 25126
18 50252
19 97223
20 194446
21 379050
22 758100
23 1486675
24 2973350
25 5858126
26 11716252
27 23166783
28 46333566
29 91869970
30 183739940
31 365088395
32 730176790

List of values

[1, 1, 2, 3, 6, 10, 20, 35, 70, 126, 252, 463, 926, 1730, 3460, 6555, 13110, 25126, 50252, 97223, 194446, 379050, 758100, 1486675, 2973350, 5858126, 11716252, 23166783, 46333566, 91869970, 183739940, 365088395, 730176790]

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

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