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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.

A165912 Number of alternating polynomials of degree 3n in GF(2)[X], n>0.

Table of values

n a(n)
1 2
2 0
3 2
4 2
5 4
6 6
7 12
8 20
9 38
10 66
11 124
12 224
13 420
14 774
15 1456
16 2720
17 5140
18 9690
19 18396
20 34918
21 66576
22 127038
23 243148
24 465920
25 894784
26 1720530
27 3314018
28 6390930
29 12341860
30 23860200
31 46182444
32 89477120
33 173534032
34 336857610
35 654471204
36 1272578048
37 2476377540
38 4822410222
39 9397535280

List of values

[2, 0, 2, 2, 4, 6, 12, 20, 38, 66, 124, 224, 420, 774, 1456, 2720, 5140, 9690, 18396, 34918, 66576, 127038, 243148, 465920, 894784, 1720530, 3314018, 6390930, 12341860, 23860200, 46182444, 89477120, 173534032, 336857610, 654471204, 1272578048, 2476377540, 4822410222, 9397535280]

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

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