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A086355
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Fixed point if [nonzero-digit product]-function at initial-value=p[n]=nth prime is iterated.
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0
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2, 3, 5, 7, 1, 3, 7, 9, 6, 8, 3, 2, 4, 2, 6, 5, 2, 6, 8, 7, 2, 8, 8, 4, 8, 1, 3, 7, 9, 3, 4, 3, 2, 4, 8, 5, 5, 8, 8, 2, 8, 8, 9, 4, 8, 8, 2, 2, 6, 8, 8, 2, 8, 1, 7, 8, 8, 4, 4, 6, 6, 2, 2, 3, 9, 2, 9, 8, 6, 8, 2, 5, 2, 8, 4, 4, 2, 4, 4, 8, 8, 8, 2, 8, 8, 6, 6, 4, 8, 4, 6, 2, 6, 8, 8, 5, 2, 1, 3, 2, 4, 5, 9, 4, 5
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(n)=A051802[A000040(n)]=fixed-point of A051801[nth prime]
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EXAMPLE
| n=100, p(100)=541, iteration list={541,20,2},a(100)=2.
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MATHEMATICA
| prd[x_] := Apply[Times, DeleteCases[IntegerDigits[x], 0]] Table[FixedPoint[prd, Prime[w]], {w, 1, 128}]
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CROSSREFS
| Cf. A051801, A051802, A086353-A086361, A029898, A010888, A038194.
Sequence in context: A007652 A060418 A199975 * A053666 A101987 A178743
Adjacent sequences: A086352 A086353 A086354 * A086356 A086357 A086358
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KEYWORD
| base,nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jul 21 2003
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