OFFSET
1,1
COMMENTS
Includes 10^(4*k+2)-10^(3*k+2)+10^(k+1)-3 for k >= 1. - Robert Israel, Jun 20 2018
LINKS
Robert Israel, Table of n, a(n) for n = 1..2282
MAPLE
Res:= NULL: count:= 0:
for d from 1 while count < 100 do
R:= sort(select(t -> t^2 + 8*t - 4 > 10^(2*d-1) and t^2+8*t-4 < 10^(2*d), map(t -> rhs(op(t)), [msolve(n^2+8*n-4, 10^d+1)])));
count := count+nops(R);
Res:= Res, op(R);
od:
Res; # Robert Israel, Jun 20 2018
CROSSREFS
KEYWORD
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved