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 A225891 Numbers obtained by rotating left the indices in the prime signature of n. 5
 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 18, 13, 14, 15, 16, 17, 12, 19, 50, 21, 22, 23, 54, 25, 26, 27, 98, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 250, 41, 42, 43, 242, 75, 46, 47, 162, 49, 20, 51, 338, 53, 24, 55, 686, 57, 58, 59, 150, 61, 62, 147, 64, 65, 66 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Inverse permutation to A105119. A072774 gives the fixed points. The first term which is different from A105119 is a(60). The first term which is different from A069799 is a(90). LINKS Paul Tek, Table of n, a(n) for n = 1..10000 EXAMPLE a(2250) = a(2*3^2*5^3) = 2^2*3^3*5 = 540. MATHEMATICA Table[Times @@ ((ar = Transpose[FactorInteger[n]])[[1]]^RotateLeft[ar[[2]]]), {n, 66}] (* Ivan Neretin, Jul 09 2015 *) PROG (PARI) { a(n)=my(f=factor(n), l=#f[, 1]); return(prod(i=1, l, f[i, 1]^f[if(i==l, 1, i+1), 2])) } CROSSREFS Cf. A105119, A072774, A069799. Sequence in context: A072356 A105119 A069799 * A295417 A293448 A085079 Adjacent sequences:  A225888 A225889 A225890 * A225892 A225893 A225894 KEYWORD nonn AUTHOR Paul Tek, May 20 2013 STATUS approved

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Last modified February 23 04:44 EST 2019. Contains 320411 sequences. (Running on oeis4.)