A087668 Indices of records in A087664.

8, 9, 11, 13, 15, 133, 2317, 39845, 108167, 46779959, 70246181, 248897669, 452691117, 1137506437, 3089581031

Offset: 1

Author

N. J. A. Sloane, Sep 27 2003

Keywords

• nonn
• more

Comments

No other terms below 10^10.

Crossrefs

Cf. A087664, A087667.

Programs

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

Extensions

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

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