This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A283673 a(n) = lcm(q(n - q(n+1) + 2), q(n - q(n) + 2)) where q(n) = A005185(n). 3
 1, 2, 2, 2, 6, 6, 3, 3, 3, 4, 15, 4, 5, 20, 5, 30, 30, 6, 6, 6, 6, 8, 24, 24, 8, 8, 8, 8, 10, 72, 72, 10, 110, 90, 99, 11, 110, 11, 132, 132, 12, 12, 12, 12, 12, 16, 70, 154, 112, 48, 84, 112, 112, 14, 16, 112, 16, 16, 16, 16, 20, 272, 238, 357, 304, 272, 380, 20, 340, 357, 399 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS See the order of chaotic subsequences in scatterplot link. LINKS Altug Alkan, Table of n, a(n) for n = 1..10000 Altug Alkan, Alternative Scatterplot of A283673 EXAMPLE a(4) = lcm(A005185(4 - A005185(5) + 2), A005185(4 - A005185(4) + 2)) = lcm(A005185(3), A005185(3)) = lcm(2, 2) = 2. MATHEMATICA q[1] = q[2] = 1; q[n_] := q[n] = q[n - q[n - 1]] + q[n - q[n - 2]]; Table[LCM[q[n - q[n + 1] + 2], q[n - q[n] + 2]], {n, 71}] (* Indranil Ghosh, Mar 14 2017 *) PROG (PARI) a=vector(1001); a[1]=a[2]=1; for(n=3, #a, a[n]=a[n-a[n-1]]+a[n-a[n-2]]); va = vector(1000, n, lcm(a[n+2-a[n+1]], a[n+2-a[n]])) CROSSREFS Cf. A005185, A283672, A283677. Sequence in context: A088681 A078584 A242010 * A198472 A171698 A080969 Adjacent sequences:  A283670 A283671 A283672 * A283674 A283675 A283676 KEYWORD nonn,look AUTHOR Altug Alkan, Mar 14 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 22 20:43 EDT 2019. Contains 326198 sequences. (Running on oeis4.)