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 A245416 Number of nonnegative integers with property that their base 9/2 expansion (see A024650) has n digits. 0
 9, 36, 162, 729, 3276, 14742, 66339, 298530, 1343385, 6045228, 27203526, 122415867, 550871406, 2478921327, 11155145967, 50198156856, 225891705852, 1016512676334, 4574307043503, 20584381695759, 92629717630920, 416833729339140, 1875751782026130 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE The numbers 9-44 are represented by 20, 21, 22, 23, 24, 25, 26, 27, 28, 40, 41, 42, 43, 44, 45, 46, 47, 48, 60, 61, 62, 63, 64, 65, 66, 67, 68, 80, 81, 82, 83, 84, 85, 86, 87, 88 respectively in base 9/2. These are the only integers with two digits, and so a(2)=36. PROG (Sage) A=[1] for i in [1..60]:     A.append(ceil((9-2)/2*sum(A))) [9*x for x in A] CROSSREFS Cf. A024650, A081848. Sequence in context: A002063 A285674 A075674 * A265837 A264359 A280353 Adjacent sequences:  A245413 A245414 A245415 * A245417 A245418 A245419 KEYWORD nonn,base AUTHOR James Van Alstine, Jul 21 2014 STATUS approved

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Last modified June 19 17:12 EDT 2021. Contains 345144 sequences. (Running on oeis4.)