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Search: id:A124875
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| 3, 251, 37, 5449, 53, 2591, 2538983, 2437, 4957, 11743, 151099201553, 12697, 8868751511, 56154295334575853, 4480577578703, 1254664312327399, 2591, 1683118856778495358491487, 13921, 7170253, 7829357
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OFFSET
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2,1
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COMMENT
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For all n>2, the exponent of a(n) in the factorization of A007408(n) appears to be 1.
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EXAMPLE
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The offset is 2 since A007408(1) = 1 has no prime divisors at all.
a(2) = 3 is the largest prime dividing A007408(2)=9,
a(3) = 251 is the largest prime dividing A007408(3)=251,
a(4) = 37 since A007408(4)=5 x 11 x 37.
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MAPLE
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seq(op([ -1, -2], op(-1, ifactors(A007408(n)))), n=2..25);
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CROSSREFS
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Cf. A007408, A124876, A124877.
Sequence in context: A092799 A140163 A082717 this_sequence A025418 A075901 A028918
Adjacent sequences: A124872 A124873 A124874 this_sequence A124876 A124877 A124878
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KEYWORD
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nonn
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AUTHOR
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M. F. Hasler (Maximilian.Hasler(AT)gmail.com), Nov 11 2006
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