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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.

A298561 Triangle read by rows. T(n,k) is the number of direct sum decompositions of GF(2)^n into subspaces of dimension at most k, 1<=k<=n.

Table of values

n a(n)
1 1
2 3
3 4
4 28
5 56
6 57
7 840
8 2800
9 2920
10 2921
11 83328
12 499968
13 539648
14 540144
15 540145
16 27998208
17 323534848
18 363889408
19 364556032
20 364558048
21 364558049
22 32509919232
23 765789208576
24 904149876736
25 906907414528
26 906918338560
27 906918346688
28 906918346689

List of values

[1, 3, 4, 28, 56, 57, 840, 2800, 2920, 2921, 83328, 499968, 539648, 540144, 540145, 27998208, 323534848, 363889408, 364556032, 364558048, 364558049, 32509919232, 765789208576, 904149876736, 906907414528, 906918338560, 906918346688, 906918346689]

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

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