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 A094333 a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of successive numbers. Terms with more than one digit must be a concatenation of at least two successive numbers. 3
 1, 2, 4, 8, 56, 5152, 17181920, 479839479840, 552587148319552587148320, 370210294386175240152319370210294386175240152320 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Paul Tek, Table of n, a(n) for n = 1..14 EXAMPLE a(3) = 4 is the smallest proper multiple of 2 which is a concatenation of a (single) number. a(5) = 56 and a(6) = 5152 =56*92 is the concatenation of 51 and 52. CROSSREFS Cf. A035333, A094334, A225796. Sequence in context: A068620 A073953 A206850 * A018473 A004094 A028910 Adjacent sequences: A094330 A094331 A094332 * A094334 A094335 A094336 KEYWORD base,nonn AUTHOR Amarnath Murthy, May 16 2004 EXTENSIONS a(7), a(8) from D. S. McNeil, Mar 23 2009 a(9) from Donovan Johnson, Mar 09 2011 a(10) from Paul Tek, Jul 27 2013 STATUS approved

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Last modified June 19 18:42 EDT 2024. Contains 373507 sequences. (Running on oeis4.)