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Search: id:A133976
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| A133976 |
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Home primes whose homeliness is 11. |
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+0
13
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| 379811, 1173463, 2314723, 2315641, 2337607, 3182561, 3371237, 3372371, 3376991, 3379997, 3383777, 3411901, 3539857, 3710627, 3779873, 3791453, 3792179, 3795581, 3798737, 3831523, 3898513, 7338269, 7482569, 7539743
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Number of terms < 10^n: 0, 0, 0, 0, 0, 1, 24, ....
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MATHEMATICA
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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]] && lst[[n - 1]] != lst[[n]] && lst[[n]] != lst[[n + d + 1]], AppendTo[lsu, lst[[n]]]], {n, 188004 - d - 1}]; Take[Union@ lsu, 31]
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CROSSREFS
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Cf. A037274, A118756, A133975, A133956, A000014, A133958, A133960, A133962, A133964, A133966, A133968, A133970, A133972, A133974, A133978.
Sequence in context: A133977 A133978 A159265 this_sequence A157843 A157739 A106778
Adjacent sequences: A133973 A133974 A133975 this_sequence A133977 A133978 A133979
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 30 2007
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