%I
%S 1,3,15,17,233,291,577,723,1455,3615,8117,8835,9505,30833,128773,
%T 130827,239595,273435,426891,654135,676297,926117,145553,1662533,
%U 2389517,2762427,2820927,7994449,8098527,14319073,16766835,20506733,27606617
%N Starting with a(0)=1, smallest squarefree number k such that, for all a(m), m<n, k+a(m) is not squarefree.
%e 17 belongs to this sequence as 17+1, 17+3, 17+15 all are divisible by some square.
%o (PARI) v=vector(60):v[1]=1:print1("1,"):for(n=2,60, for(k=1,10^15,if(issquarefree(k),s=0:for(l=1,n1,if(issquarefree(k+v[l]),break):s=s+1)): if(s==n1,print1(k","):v[n]=k:break)))
%Y Cf. A077224.
%K nonn
%O 0,2
%A _Amarnath Murthy_, Nov 03 2002
%E Edited by _Ralf Stephan_, Mar 25 2003
%E More terms from _Sam Alexander_, Dec 12 2003
