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A133979 Home primes whose homeliness is greater than 12. 11
747521, 2333797, 2337397, 2337691, 3373547, 3373907, 3378317, 3379829, 3574657, 3639997, 3733967, 3746507, 3777419, 3784463, 3789293, 3791423, 3795569, 3798923, 4389883, 7548461 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Number of terms < 10^n: 0, 0, 0, 0, 0, 1, 20, ....

LINKS

Table of n, a(n) for n=1..20.

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 = 13 - 2; lsu = {}; Do[ If[ lst[[n]] == lst[[n + d]], AppendTo[ lsu, lst[[n]] ]], {n, 188004 - d - 1}]; Union@ lsu

CROSSREFS

Cf. A037274, A118756, A133957, A133959, A133961, A133963, A133965, A133967, A133969, A133971, A133973, A133975, A133977.

Sequence in context: A133183 A119403 A184149 * A205743 A206675 A205519

Adjacent sequences:  A133976 A133977 A133978 * A133980 A133981 A133982

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Sep 30 2007

STATUS

approved

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Last modified August 6 15:50 EDT 2020. Contains 336255 sequences. (Running on oeis4.)