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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.

A287406 Number of direct sum decompositions of a finite vector space of n dimensions over GF(2) whose subspaces are all of distinct dimensions.

Table of values

n a(n)
0 1
1 1
2 1
3 29
4 121
5 10417
6 20167393
7 1405696961
8 1671421144961
9 34853495567335169
10 18070618208072153366017
11 76880583838185587571686401
12 5835812465544660559691588302849
13 6474896789559157455730381208091095041
14 143196455096491413680184647037773197755801601
15 76671942287512076984565827384061983641627409659183105

List of values

[1, 1, 1, 29, 121, 10417, 20167393, 1405696961, 1671421144961, 34853495567335169, 18070618208072153366017, 76880583838185587571686401, 5835812465544660559691588302849, 6474896789559157455730381208091095041, 143196455096491413680184647037773197755801601, 76671942287512076984565827384061983641627409659183105]

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

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