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Search: id:A133965
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| A133965 |
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Home primes whose homeliness is greater than 5. |
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+0
13
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| 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; listen)
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OFFSET
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1,1
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COMMENT
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Number of terms < 10^n: 0, 0, 0, 2, 31, 341, 2695, ....
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EXAMPLE
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(118, 259, 737, 801, 1167, 3389) -> 3389, etc.
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MATHEMATICA
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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]
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CROSSREFS
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Cf. A037274, A118756, A133957, A133959, A133961, A133963, A133967, A133969, A133971, A133973, A133975, A133977, A133979.
Sequence in context: A044886 A116305 A116352 this_sequence A133966 A043671 A133532
Adjacent sequences: A133962 A133963 A133964 this_sequence A133966 A133967 A133968
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 30 2007
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