A320006 a(n) = 1 if n encodes a nonnegative combinatorial game (in a style of A106486), otherwise 0; Characteristic function of A126001.

1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

0

Links

Antti Karttunen, Table of n, a(n) for n = 0..65537

Index entries for characteristic functions

Prog

(PARI)
A320006(n) = if(!n, 1, my(m=(n>>1), r=0); while(m>0, if((m%2)&&!A320007(r), return(0)); m >>= 2; r++); (1));
A320007(n) = if(!n, 0, my(m=n, s=0); while(m>0, if((m%2)&&A320006(s), return(1)); m >>= 2; s++); (0));

Crossrefs

Characteristic function of A126001. The topmost row of A125999.

Cf. A320007.

Sequence in context: A285345 A125999 A073784 * A219977 A128130 A133872

Adjacent sequences: A320003 A320004 A320005 * A320007 A320008 A320009

Keyword

nonn

Author

Antti Karttunen, Oct 18 2018

Status

approved