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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.

A090503 Number of hyperplanes in a finite projective space (of some dimension d over some finite field of order q).

Table of values

n a(n)
1 7
2 13
3 15
4 21
5 31
6 40
7 57
8 63
9 73
10 85
11 91
12 121
13 127
14 133
15 156
16 183
17 255
18 273
19 307
20 341
21 364
22 381
23 400
24 511
25 553
26 585
27 651
28 757
29 781
30 820
31 871
32 993
33 1023
34 1057
35 1093
36 1365
37 1407
38 1464
39 1723
40 1893
41 2047
42 2257
43 2380
44 2451
45 2801
46 2863
47 3280
48 3541
49 3783
50 3906
51 4095
52 4161
53 4369
54 4557
55 4681
56 5113
57 5220
58 5403
59 5461
60 6321
61 6643
62 6973

List of values

[7, 13, 15, 21, 31, 40, 57, 63, 73, 85, 91, 121, 127, 133, 156, 183, 255, 273, 307, 341, 364, 381, 400, 511, 553, 585, 651, 757, 781, 820, 871, 993, 1023, 1057, 1093, 1365, 1407, 1464, 1723, 1893, 2047, 2257, 2380, 2451, 2801, 2863, 3280, 3541, 3783, 3906, 4095, 4161, 4369, 4557, 4681, 5113, 5220, 5403, 5461, 6321, 6643, 6973]

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

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