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Table of n, a(n) for n=0..68.
with(numtheory): A007947 := proc(n) local i, t1, t2; t1 :=ifactors(n); t2 := mul(t1[i], i=1..nops(t1)); end: seq(A007947(2*n-1), n=1..78); (Deutsch)
Sequence in context: A076565 A199423 A100029 * A130141 A130142 A130139
Adjacent sequences: A099981 A099982 A099983 * A099985 A099986 A099987
N. J. A. Sloane, Nov 19 2004
More terms from Emeric Deutsch, Dec 15 2004