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A082122 Smallest difference > 1 between d and p/d for any divisor d of the partial product p of the sequence, starting with 11. 1
11, 10, 17, 21, 23, 31, 43, 167, 6383, 31741, 52112213, 37549127743, 36777947021270771, 504837176634758950812127 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..13.

PROG

(PARI) p=11; print1(p, ", "); for(n=1, 50, v=divisors(p); r=sqrt(p); t=0; for(k=1, matsize(v)[2], if(v[k]>=r, t=k; break)); if(v[t]^2==p, u=t, u=t-1); if(v[t]-v[u]<2, u=u-1; t=t+1); print1(v[t]-v[u]", "); p=p*(v[t]-v[u]))

CROSSREFS

Cf. A082120, A003681 (starts with 2, 3), A082123.

Sequence in context: A060982 A324296 A323294 * A061882 A323296 A275782

Adjacent sequences:  A082119 A082120 A082121 * A082123 A082124 A082125

KEYWORD

nonn,hard

AUTHOR

Ralf Stephan, Apr 04 2003

STATUS

approved

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Last modified August 22 05:46 EDT 2019. Contains 326172 sequences. (Running on oeis4.)