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Search: id:A133979
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| A133979 |
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Home primes whose homeliness is greater than 12. |
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+0
12
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| 747521, 2333797, 2337397, 2337691, 3373547, 3373907, 3378317, 3379829, 3574657, 3639997, 3733967, 3746507, 3777419, 3784463, 3789293, 3791423, 3795569, 3798923, 4389883, 7548461
(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, 0, 0, 1, 20, ....
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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 = 13 - 2; lsu = {}; Do[ If[ lst[[n]] == lst[[n + d]], AppendTo[ lsu, lst[[n]] ]], {n, 188004 - d - 1}]; Union@ lsu
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CROSSREFS
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Cf. A037274, A118756, A133957, A133959, A133961, A133963, A133965, A133967, A133969, A133971, A133973, A133975, A133977.
Sequence in context: A107447 A133183 A119403 this_sequence A137468 A014889 A014888
Adjacent sequences: A133976 A133977 A133978 this_sequence A133980 A133981 A133982
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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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