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 A133968 Home primes whose homeliness is 7. 12
 23251, 23761, 33797, 36389, 37643, 37951, 37967, 77711, 113779, 131777, 132749, 134129, 233347, 233617, 233881, 237547, 293863, 311677, 311821, 313619, 314627, 317743, 319547, 331319, 331907, 333139, 333271, 333457, 333791, 333911, 337517 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Number of terms < 10^n: 0, 0, 0, 0, 8, 80, 667, ... . LINKS 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 = 7 - 2; lsu = {}; Do[ If[ lst[[n]] == lst[[n + d]] && lst[[n - 1]] != lst[[n]] && lst[[n]] != lst[[n + d + 1]], AppendTo[lsu, lst[[n]]]], {n, 188004 - d - 1}]; Take[Union@ lsu, 35] CROSSREFS Cf. A037274, A118756, A133967, A133956, A133957, A133958, A133960, A133962, A133964, A133966, A133970, A133972, A133974, A133976, A133978. Sequence in context: A126301 A205176 A205275 * A337784 A333746 A251111 Adjacent sequences: A133965 A133966 A133967 * A133969 A133970 A133971 KEYWORD nonn,base AUTHOR Robert G. Wilson v, Sep 30 2007 STATUS approved

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Last modified March 26 04:58 EDT 2023. Contains 361529 sequences. (Running on oeis4.)