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.
%I A215909 #7 Dec 16 2016 02:47:00 %S A215909 1,3,5,9,13,18,25,34,42,54,66,78,94,110,126,147,168,189,214,239,267, %T A215909 294,326,357,390,426,462,503,542,584,628,671,717,766,819,869,924,979, %U A215909 1035,1093,1154,1214,1280,1345,1413,1482,1553,1625,1699,1774,1850,1930 %N A215909 The number of distinct possible dimensions of unital *-subalgebras of the n X n complex matrices. %C A215909 Also the number of terms in the n-th row of A215905. %C A215909 A006171 is an upper bound of this sequence. %Y A215909 Cf. A215905. %K A215909 nonn %O A215909 1,2 %A A215909 _Nathaniel Johnston_, Aug 26 2012