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 A104425 Numbers n such that n, p[n], p[n]+n, p[n]-n and p[n]*n all are 5-less. 1
 1, 4, 6, 7, 9, 10, 11, 18, 19, 23, 27, 29, 30, 32, 40, 41, 42, 43, 44, 49, 60, 61, 63, 67, 69, 70, 73, 74, 79, 80, 110, 111, 131, 140, 143, 144, 166, 170, 171, 179, 180, 181, 183, 184, 187, 189, 193, 196, 199, 200, 201, 202, 206, 209, 223, 228, 229, 233, 261, 263, 270 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS From the first 3000 primes, only 369 are such that n, p[n], p[n]+n, p[n]-n and p[n]*n all are 5-less. LINKS MATHEMATICA id[x_]:=IntegerDigits[x]; pr[i_]:=Prime[i]; ra=Range[3000]; A104425=Select[ra, Position[Union[id[ # ], id[pr[ # ]], id[pr[ # ]+# ], id[pr[ # ]-# ], id[pr[ # ]*# ]], 5]=={}&] CROSSREFS Cf. A104419-A104428. Sequence in context: A010414 A095096 A179242 * A174258 A080746 A069909 Adjacent sequences:  A104422 A104423 A104424 * A104426 A104427 A104428 KEYWORD nonn,base AUTHOR Zak Seidov, Mar 07 2005 STATUS approved

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Last modified May 18 07:10 EDT 2013. Contains 225419 sequences.