A078919 - OEIS

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A078919

Partial products of A079069.

1, 1, 1, 1, 2, 4, 12, 72, 576, 12096, 653184, 114960384, 132779243520, 1269104009564160, 258206825369885736960, 2850769895485902112338739200, 5543726888202115028458043149398835200, 12452794281642743516125592836044191777302983475200

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OFFSET

1,5

LINKS

Table of n, a(n) for n=1..18.

FORMULA

a(n)=(a(n-2)+a(n-3))*a(n-1)/a(n-4), n>4. a(1)=a(2)=a(3)=a(4)=1.

MATHEMATICA

RecurrenceTable[{a[1]==a[2]==a[3]==a[4]==1, a[n]==(a[n-2]+a[n-3]) a[n-1]/a[n-4]}, a, {n, 20}] (* Harvey P. Dale, Mar 12 2015 *)

CROSSREFS

Cf. A078918.

a(n+1)/a(n)=A079069(n).

Sequence in context: A266463 A013207 A172165 * A372994 A085864 A060935

Adjacent sequences: A078916 A078917 A078918 * A078920 A078921 A078922

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Dec 13 2002

EXTENSIONS

One more term (a(18)) from Harvey P. Dale, Mar 12 2015

STATUS

approved