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 A053025 Number of iterations of A000005 required to reach 2 when started at n!. 2
 1, 1, 4, 5, 4, 6, 7, 7, 7, 5, 7, 7, 7, 7, 7, 6, 7, 7, 7, 7, 7, 8, 7, 7, 7, 7, 6, 6, 8, 6, 7, 6, 7, 8, 6, 8, 7, 5, 7, 6, 8, 6, 6, 8, 8, 8, 8, 8, 8, 6, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 8, 7, 8, 7, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 8, 7, 8, 8, 8, 7, 8, 8, 7, 8, 8, 8, 8, 8 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS FORMULA a(n)=A036459(A000142(n))=A036459(n!); a(n) is the smallest so that Nest[A000005, n, a(n)]=2 EXAMPLE for n=108, a(108)=9 because the sequence of iterates is {108!,798687560466432000,7920,60,12,6,4,3,2}, length=9 CROSSREFS Sequence in context: A223170 A198817 A085428 * A010664 A074967 A021877 Adjacent sequences:  A053022 A053023 A053024 * A053026 A053027 A053028 KEYWORD nonn AUTHOR Labos E. (labos(AT)ana.sote.hu), Feb 24 2000 STATUS approved

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