OFFSET
0,1
COMMENTS
According to theorem 2 of the Milnor paper a(2) and a(4) through a(8) are lower bounds for the number of distinct differentiable structures on spheres S^(4*k-1) for k = 2 and 4,..,8. Better bounds are given in A242032.
LINKS
John Milnor, Differentiable Structures on Spheres, American Journal of Mathematics, Vol. 81, No. 4 (Oct., 1959), pp. 962-972. [See p. 971]
FORMULA
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Aug 12 2014
STATUS
approved