A025492 Fixed point reached by iterating the Kempner function A002034 starting at n.
1, 2, 3, 4, 5, 3, 7, 4, 3, 5, 11, 4, 13, 7, 5, 3, 17, 3, 19, 5, 7, 11, 23, 4, 5, 13, 3, 7, 29, 5, 31, 4, 11, 17, 7, 3, 37, 19, 13, 5, 41, 7, 43, 11, 3, 23, 47, 3, 7, 5, 17, 13, 53, 3, 11, 7, 19, 29, 59, 5, 61, 31, 7, 4, 13, 11, 67, 17, 23, 7, 71, 3, 73, 37, 5, 19, 11, 13, 79, 3, 3, 41, 83, 7, 17
Offset: 1
Links
- Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Programs
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Haskell
a025492 n = fst $ until (uncurry (==)) (\(x,x') -> (a002034 x, x)) (n,0) -- Reinhard Zumkeller, Mar 09 2012
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Mathematica
k[n_] := (m=1; While[ !IntegerQ[m!/n], m++]; m); a[n_] := FixedPoint[k, n]; Table[ a[n], {n, 1, 85}] (* Jean-François Alcover, Mar 15 2012 *)