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A133965 Home primes whose homeliness is greater than 5. 12
3389, 3761, 13367, 23251, 23761, 23929, 31193, 31397, 33797, 36389, 37199, 37463, 37547, 37607, 37643, 37717, 37853, 37907, 37951, 37967, 41863, 41887, 41941, 73331, 74759, 74771, 77269, 77711, 77773, 77797, 83383, 112909, 113779, 114773 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Number of terms < 10^n: 0, 0, 0, 2, 31, 341, 2695, ....
LINKS
EXAMPLE
(118, 259, 737, 801, 1167, 3389) -> 3389, etc.
MATHEMATICA
lst = {}; f[n_] := FromDigits@ Flatten[ IntegerDigits@ Table[ #[[1]], {#[[2]]}] & /@ FactorInteger@n, 2]; h[n_] := NestWhileList[f@# &, n, !PrimeQ@# &, 1, 28]; Do[p = h[n][[ -1]]; If[ PrimeQ@p && p < 10^7 && p != n, Print[{n, p}]; AppendTo[lst, p]], {n, 2, 1000}];
d = 6 - 2; lsu = {}; Do[ If[ lst[[n]] == lst[[n + d]], AppendTo[ lsu, lst[[n]] ]], {n, 188004 - d - 1}]; Take[ Union@ lsu, 35]
CROSSREFS
Sequence in context: A116352 A153746 A243217 * A031611 A133966 A043671
KEYWORD
nonn,base
AUTHOR
Robert G. Wilson v, Sep 30 2007
STATUS
approved

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Last modified May 26 01:42 EDT 2024. Contains 372807 sequences. (Running on oeis4.)