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Search: id:A082121
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| A082121 |
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Smallest difference>1 between d and p/d for any divisor d of the partial product p of the sequence, starting with 7. |
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+0
2
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| 7, 6, 11, 19, 37, 109, 515, 3301, 267271, 130914197, 209015618081, 887384060899271, 58605404461258015758293
(list; graph; listen)
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OFFSET
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0,1
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PROGRAM
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(PARI) p=7: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]))
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CROSSREFS
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Cf. A082120, A003681 (starts with 2, 3), A082122.
Adjacent sequences: A082118 A082119 A082120 this_sequence A082122 A082123 A082124
Sequence in context: A021017 A021569 A085964 this_sequence A078323 A099255 A073112
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KEYWORD
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nonn,hard
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AUTHOR
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Ralf Stephan (ralf(AT)ark.in-berlin.de), Apr 04 2003
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