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A173094 a(1)=2, a(2)=3, a(n)=a(n-2)*a(n-1)-a(n-1). 5
2, 3, 3, 6, 12, 60, 660, 38940, 25661460, 999231590940, 25641740502411581460, 25622037156669717708454796390940, 656993627914472375437286314449293585586011019581460 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

MATHEMATICA

a=2; b=3; lst={a, b}; Do[c=a*b-b; AppendTo[lst, c]; a=b; b=c, {n, 13}]; lst

RecurrenceTable[{a[1]==2, a[2]==3, a[n]==a[n-2]a[n-1]-a[n-1]}, a, {n, 20}] (* Harvey P. Dale, Oct 10 2015 *)

CROSSREFS

Cf. A173093

Sequence in context: A054630 A049875 A180887 * A087989 A103356 A028257

Adjacent sequences:  A173091 A173092 A173093 * A173095 A173096 A173097

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Feb 09 2010

EXTENSIONS

Definition corrected by Harvey P. Dale, Oct 10 2015

STATUS

approved

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Last modified October 20 12:47 EDT 2019. Contains 328257 sequences. (Running on oeis4.)