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 A085946 a(1) = 1, a(2) = 2 and a(n) = smallest number not included earlier that divides the concatenation a(n-2), a(n-1). 2
 1, 2, 3, 23, 17, 7, 59, 11, 257, 11257, 13, 1125713, 43708571, 19, 9, 199, 9199, 43, 487, 43487, 39, 228881, 811, 1973, 41, 197341, 51, 379, 191, 126397, 21, 731, 31, 57, 77, 53, 7753, 79, 70489, 346543, 121, 346543121, 47, 37, 1579, 101, 526367, 5343493 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS 2 is the only even member. No member is divisible by 5. - David Wasserman, Feb 14 2005 Is this sequence finite? The base 2, base 3 and base 5 variants are finite, with 42514, 64 and 2786 terms respectively. - Rémy Sigrist, Oct 19 2019 LINKS Rémy Sigrist, Table of n, a(n) for n = 1..10000 Rémy Sigrist, PARI program for A085946 EXAMPLE 3,23,17 are three successive terms and 17 divides 323. similarly 7 divides 2317 etc. CROSSREFS (PARI) See Links section. Sequence in context: A282795 A071819 A329916 * A280894 A042585 A143279 Adjacent sequences:  A085943 A085944 A085945 * A085947 A085948 A085949 KEYWORD base,nonn AUTHOR Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 14 2003 EXTENSIONS More terms from David Wasserman, Feb 14 2005 STATUS approved

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Last modified February 24 04:35 EST 2020. Contains 332197 sequences. (Running on oeis4.)