A133971 Home primes whose homeliness is greater than 8.

77773, 178069, 229751, 312619, 313613, 313739, 317741, 317903, 337457, 337853, 352489, 359929, 364627, 374531, 374587, 375743, 375997, 378997, 379103, 379187, 379397, 379811, 379997, 389971, 719239, 733391, 742283, 747521, 749711, 771941

Offset

1,1

Comments

Number of terms < 10^n: 0, 0, 0, 0, 1, 31, 288, ....

Links

Table of n, a(n) for n=1..30.

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 = 9 - 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, A133973, A133975, A133977, A133979.

Sequence in context: A250012 A235979 A087026 * A133973 A133974 A321235

Adjacent sequences: A133968 A133969 A133970 * A133972 A133973 A133974

Keyword

nonn,base

Author

Robert G. Wilson v, Sep 30 2007

Status

approved