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1, 2, 3, 6, 10, 15, 21, 30, 42, 70, 105, 110, 210, 330, 390, 462, 546, 770, 910, 1155
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| First few terms of A152235 are 1, 2, 2, 3, 2, 2, 2, 2, 3, 2, 2, 6, so a(1) to a(4) are 1, 2, 3, 6.
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PROG
| (MAGMA) R:=[]; r:=0; for n in [1..1300000] do a:=&*PrimeDivisors(NumberOfDivisors(n)); if r lt a then r:=a; Append(~R, a); end if; end for; print R;
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CROSSREFS
| Cf. A152235 (largest squarefree number dividing the number of divisors of n), A152453 (where records in occur in A152235), A007947 (largest squarefree number dividing n).
Sequence in context: A090035 A111467 A102366 * A074134 A056178 A018141
Adjacent sequences: A152449 A152450 A152451 * A152453 A152454 A152455
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KEYWORD
| more,nonn
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AUTHOR
| Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Dec 04 2008
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EXTENSIONS
| a(15)-a(18) from Sean A. Irvine (sairvin(AT)xtra.co.nz), Mar 09 2011
a(19)-a(20) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Jul 30 2011
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