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 A034584 #33 Jul 08 2025 21:19:08 %S A034584 0,1,2,2,3,3,3,3,4,5,6,6,7,7,7,7,8,9,10,10,11,11,11,11,12,13,14,14,15, %T A034584 15,15,15,16,17,18,18,19,19,19,19,20,21,22,22,23,23,23,23,24,25,26,26, %U A034584 27,27,27,27,28,29,30,30,31,31,31,31 %N A034584 Radon-Hurwitz numbers: log_2 of dimension of an irreducible R-module for Clifford algebra Cl_n. %D A034584 H. Blaine Lawson, Jr. and M.-L. Michelsohn, Spin Geometry, Princeton, p. 33. %D A034584 Pertti Lounesto, Clifford Algebras and Spinors, Cambridge, 1997, p. 226. %F A034584 a(n+8) = a(n) + 4, n >= 0, a(0) = 0, a(1) = 1, a(2)= a(3) = 2, a(4) = a(5) = a(6) = a(7) =3. %F A034584 G.f.: x*(1+ x + x^3 + x^7)/((1 - x)*(1 - x^8)). - _Wolfdieter Lang_, Oct 03 2014 %o A034584 (PARI) concat(0, Vec(x*(1+ x + x^3 + x^7)/((1 - x)*(1 - x^8)) + O(x^80))) \\ _Michel Marcus_, Oct 03 2014 %Y A034584 Cf. A003484, A034583-A034586. %K A034584 nonn,easy %O A034584 0,3 %A A034584 _N. J. A. Sloane_