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A007807 A variation on Euclid: a(n)=g(n)-1, where g(0)=0, g(1)=1, g(n+1)=g(n)(g(n-1)+1). 1
0, 0, 1, 3, 11, 59, 779, 47579, 37159979, 1768109008379, 65702897157329640779, 116169884340604934905464739377179, 7632697963609645128663145969343357330533515068777579 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

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

M. E. Mays, Iterating the division algorithm, Fib. Quart., 25 (1987), 204-213.

FORMULA

a(n) = A005831(n) - 1 for all n>0. - Michael Somos, Jan 17 2015

PROG

(PARI) {a(n) = if( n<4, n==3, -1 + (1 + a(n-1)) * (2 + a(n-2)))}; /* Michael Somos, Jan 17 2015 */

CROSSREFS

Cf. A005831.

Sequence in context: A276746 A112368 A152796 * A075201 A136440 A303871

Adjacent sequences:  A007804 A007805 A007806 * A007808 A007809 A007810

KEYWORD

nonn

AUTHOR

mays(AT)math.wvu.edu (Mike Mays)

STATUS

approved

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)