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 A068587 Multiplicative 3-wave sequence starting with 1,2,3. 0
 1, 2, 3, 6, 6, 36, 108, 3888, 23328, 90699264, 9795520512, 888446500935303168, 20725679973818752303104, 18413657852244156256526524022900467433472, 180371363192607497842938699938382286478962971377664 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS FORMULA a(n)=a(n-1)*a(n-2) if n is odd, a(n)=a(n-1)*a(n-4) if n is even. MAPLE For given n, this generates terms with index 0 through 2n: a[0] := 1; a[1] := 2; a[2] := 3; for i from 1 to n-1 do a[2*i+1] := a[2*i]*a[2*i-1]; a[2*i+2] := a[2*i+1]*a[2*i-2]; od; # Christopher N. Swanson (cswanson(AT)ashland.edu), Jul 22 2003 CROSSREFS Cf. A038196. Sequence in context: A015628 A060692 A015698 * A218954 A182560 A298750 Adjacent sequences:  A068584 A068585 A068586 * A068588 A068589 A068590 KEYWORD nonn,easy AUTHOR Floor van Lamoen, Mar 21 2002 EXTENSIONS More terms from Christopher N. Swanson (cswanson(AT)ashland.edu), Jul 22 2003 STATUS approved

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Last modified October 17 19:36 EDT 2018. Contains 316293 sequences. (Running on oeis4.)