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A087667 Records in A087664. 3
0, 2, 4, 5, 9, 12, 16, 24, 29, 30, 31, 32, 36, 37, 42 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

FORMULA

a(n)=A087664(A087668(n)). - R. J. Mathar, Nov 25 2006

PROG

(PARI) A087664(n)={ local(x, s) ; x=n/4 ; s=0 ; while( type(x)!="t_INT", x *= floor(x) ; s++ ; ) ; return(s) ; } { rec=-1 ; for(n=8, 1000000, a=A087664(n) ; if(a>rec, rec=a ; print(rec) ; ) ; ) ; } - R. J. Mathar, Nov 25 2006

CROSSREFS

Cf. A087664, A087668.

Sequence in context: A295564 A236336 A239515 * A241444 A082592 A241339

Adjacent sequences:  A087664 A087665 A087666 * A087668 A087669 A087670

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Sep 27 2003

EXTENSIONS

More terms from R. J. Mathar, Nov 25 2006

a(8)-a(15) from Max Alekseyev, Jul 30 2011

STATUS

approved

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Last modified April 21 17:36 EDT 2021. Contains 343156 sequences. (Running on oeis4.)