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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.

A073999 Number of strings of length n over GF(4) with trace 1 and subtrace x where x = RootOf(z^2+z+1).

Table of values

n a(n)
1 0
2 0
3 3
4 16
5 60
6 240
7 1008
8 4096
9 16320
10 65280
11 261888
12 1048576
13 4193280
14 16773120
15 67104768
16 268435456
17 1073725440
18 4294901760
19 17179803648
20 68719476736
21 274877644800
22 1099510579200
23 4398045462528
24 17592186044416
25 70368739983360
26 281474959933440
27 1125899890065408
28 4503599627370496
29 18014398442373120

List of values

[0, 0, 3, 16, 60, 240, 1008, 4096, 16320, 65280, 261888, 1048576, 4193280, 16773120, 67104768, 268435456, 1073725440, 4294901760, 17179803648, 68719476736, 274877644800, 1099510579200, 4398045462528, 17592186044416, 70368739983360, 281474959933440, 1125899890065408, 4503599627370496, 18014398442373120]

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

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