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 A307102 Numbers written in base of double factorial numbers (A006882). 2
 1, 10, 100, 101, 110, 200, 201, 1000, 1001, 1010, 1100, 1101, 1110, 1200, 10000, 10001, 10010, 10100, 10101, 10110, 10200, 10201, 11000, 11001, 11010, 11100, 11101, 11110, 11200, 20000, 20001, 20010, 20100, 20101, 20110, 20200, 20201, 21000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(1122755752855713895623244049306709034778906250) is the first term which cannot be included in the OEIS since it includes a non-decimal digit. - Charles R Greathouse IV, Sep 19 2012 Numbers in this mixed radix number system can have multiple representations, to avoid ambiguity this sequence assumes a greedy approach where leading digits are made as high as possible; thus we choose a(30) = 20000 rather than a(30) = 11201. - Sean A. Irvine, Mar 24 2019 LINKS Sean A. Irvine, Table of n, a(n) for n = 1..10000 F. Iacobescu, Smarandache Partition Type and Other Sequences, Bull. Pure Appl. Sciences, Vol. 16E, No. 2 (1997), pp. 237-240. Sean A. Irvine, Java program (github) F. Smarandache, Collected Papers, Vol. II F. Smarandache, Sequences of Numbers Involved in Unsolved Problems. Eric Weisstein's World of Mathematics, Smarandache Sequences EXAMPLE The digits positions have values 1, 2, 3, 8, 15, etc., hence a(29) = 11200 because 29 = 15 + 8 + 2 * 3. CROSSREFS Cf. A006882 (double factorial numbers), A007623 (factorial base), A019513 (erroneous version). Sequence in context: A107411 A297065 A019513 * A037415 A123001 A014417 Adjacent sequences:  A307099 A307100 A307101 * A307103 A307104 A307105 KEYWORD nonn AUTHOR Sean A. Irvine, Mar 24 2019 STATUS approved

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Last modified December 7 22:50 EST 2021. Contains 349590 sequences. (Running on oeis4.)