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A133975 Home primes whose homeliness is greater than 10. 12
378997, 379811, 747521, 777643, 1173463, 2314723, 2315641, 2333797, 2337397, 2337607, 2337691, 3127979, 3127997, 3136607, 3173761, 3182561, 3371237, 3372371, 3373547, 3373907, 3374729, 3376991, 3377999, 3378317, 3379829 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Number of terms < 10^n: 0, 0, 0, 0, 0, 4, 60, ....

LINKS

Table of n, a(n) for n=1..25.

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 = 11 - 2; lsu = {}; Do[ If[ lst[[n]] == lst[[n + d]], AppendTo[ lsu, lst[[n]] ]], {n, 188004 - d - 1}]; Take[ Union@ lsu, 30]

CROSSREFS

Cf. A037274, A118756, A133957, A133959, A133961, A133963, A133965, A133967, A133969, A133971, A133973, A133977, A133979.

Sequence in context: A318964 A226361 A238078 * A133977 A133978 A159265

Adjacent sequences:  A133972 A133973 A133974 * A133976 A133977 A133978

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Sep 30 2007

STATUS

approved

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Last modified August 6 16:03 EDT 2020. Contains 336255 sequences. (Running on oeis4.)