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A080793 Starting with a(0)=1, smallest number k>a(n-1) such that, for all a(m) with m<n, k+a(m) is not squarefree. 0
1, 3, 15, 17, 147, 233, 577, 735, 3615, 4335, 8117, 9505, 10947, 14403, 25215, 30833, 128773, 220647, 251173, 522003, 617547, 770977, 926117, 967335, 1455533, 1662533, 1960215, 2389517, 2469747, 3528147, 4674747, 5556747, 5730135 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..32.

PROG

(PARI) v=vector(60); v[1]=1; print1("1, "); for(n=2, 60, for(k=v[n-1]+1, 10^15, 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: A080705 A032921 A163785 * A077225 A236526 A039559

Adjacent sequences:  A080790 A080791 A080792 * A080794 A080795 A080796

KEYWORD

nonn

AUTHOR

Ralf Stephan, Mar 25 2003

EXTENSIONS

More terms from Lambert Klasen (Lambert.Klasen(AT)gmx.net) and lambert.herrgesell(AT)aschendorff.de, Jul 26 2005

STATUS

approved

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Last modified July 23 22:20 EDT 2021. Contains 346265 sequences. (Running on oeis4.)