A121847 - OEIS

%I #2 Mar 30 2012 17:25:49

%S 0,5,6,15,17,31,30,33,51,50,54,77,76,75,80,107,106,105,143,142,111

%N The spiral parameter alpha for the icosahedral fullerenes C_n.

%D P. W. Fowler and K. M. Rogers, "Spiral Codes and Goldberg Representations of Icosahedral Fullerenes and Octahedral Analogues", J. Chem. Inf. Comput. Sci., vol. 41 (2001) 108-111.

%e If n=80 then alpha is 6.

%e If n=500 then alpha is 54.

%K nonn,uned

%O 20,2

%A _Parthasarathy Nambi_, Aug 29 2006