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 A152834 Numbers of form 6k+1 that use only digits 2 and 3. 3
 223, 2233, 2323, 3223, 22333, 23233, 23323, 32233, 32323, 33223, 222223, 223333, 232333, 233233, 233323, 322333, 323233, 323323, 332233, 332323, 333223, 2222233, 2222323, 2223223, 2232223, 2233333, 2322223, 2323333, 2332333, 2333233, 2333323, 3222223 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Equivalently, sequences of 2's and 3's, ending with 3, where the number of 2's is congruent to 2 mod 3. - Franklin T. Adams-Watters, Dec 14 2008 LINKS Robert Israel, Table of n, a(n) for n = 1..340 MAPLE (Maple program from Robert Israel:) M:= proc(n) option remember; (map(t -> 2*10^n+t, M(n-1)) union map(t -> 3*10^n+t, M(n-1))) end proc; M(0):= {2, 3}; select(t -> (t mod 6 = 1), `union`(seq(M(n), n=1..9))); MATHEMATICA Do[If[Union[IntegerDigits[6k+1]]=={2, 3}, Print[6k+1]], {k, 100000}] Select[Flatten[Table[FromDigits/@Tuples[{2, 3}, n], {n, 7}]], Mod[#, 6]==1&] (* Harvey P. Dale, Aug 02 2015 *) PROG (PARI) is(n)=n%30==13 && Set(digits(n))==[2, 3] \\ Charles R Greathouse IV, Feb 15 2017 CROSSREFS Subsequence of A152824. Sequence in context: A253953 A205273 A205266 * A139233 A205265 A153165 Adjacent sequences:  A152831 A152832 A152833 * A152835 A152836 A152837 KEYWORD nonn,base,easy AUTHOR Zak Seidov, Dec 14 2008 EXTENSIONS Extended by Robert Israel, Dec 14 2008 STATUS approved

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Last modified May 16 14:39 EDT 2021. Contains 343949 sequences. (Running on oeis4.)