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A080797
Starting with a(0)=5, a(n) = smallest squarefree number k such that, for all a(m) with m<n, k+a(m) is not squarefree.
1
5, 3, 13, 15, 85, 291, 545, 723, 1455, 2345, 3605, 3613, 3615, 8835, 17653, 27545, 79205, 130827, 231097, 239595, 273435, 426891, 564565, 654135, 785065, 2762427, 2820927, 3335045, 3369253, 6526885, 8098527, 16766835, 43558023, 46352705
OFFSET
0,1
PROG
(PARI) v=vector(60); v[1]=5; print1("5, "); for(n=2, 60, for(k=1, 10^15, if(issquarefree(k), s=0; for(l=1, n-1, if(issquarefree(k+v[l]), break); s=s+1)); if(s==n-1, print1(k", "); v[n]=k; break)))
CROSSREFS
Cf. A077225.
Sequence in context: A349156 A372313 A206435 * A376975 A358440 A280818
KEYWORD
nonn
AUTHOR
Ralf Stephan, Mar 25 2003
EXTENSIONS
More terms from Sam Alexander, Dec 12 2003
STATUS
approved