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A133977 Home primes whose homeliness is greater than 11. 12
378997, 747521, 777643, 2333797, 2337397, 2337691, 3127979, 3127997, 3136607, 3173761, 3373547, 3373907, 3374729, 3377999, 3378317, 3379829, 3574657, 3639997, 3733967, 3746507, 3759263, 3774161, 3777419, 3784463, 3789293 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Number of terms < 10^n: 0, 0, 0, 0, 0, 3, 36, ....

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 = 12 - 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, A133975, A133979.

Sequence in context: A226361 A238078 A133975 * A133978 A159265 A133976

Adjacent sequences:  A133974 A133975 A133976 * A133978 A133979 A133980

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.)