login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A087668 Indices of records in A087664. 3
8, 9, 11, 13, 15, 133, 2317, 39845, 108167, 46779959, 70246181, 248897669, 452691117, 1137506437, 3089581031 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No other terms below 10^10.

LINKS

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

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(n) ; ) ; ) ; } - R. J. Mathar, Nov 25 2006

CROSSREFS

Cf. A087664, A087667.

Sequence in context: A188056 A128234 A308602 * A120176 A139049 A048590

Adjacent sequences:  A087665 A087666 A087667 * A087669 A087670 A087671

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Sep 27 2003

EXTENSIONS

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

a(9)-a(15) from Max Alekseyev, Jul 30 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

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