OFFSET
1,3
COMMENTS
XOR is A003987.
Integers k such that binomial(11*k,2*k) is odd. - Robert Israel, Jun 20 2018
LINKS
MAPLE
select(n -> Bits:-And(2*n, 9*n)=0, [$0..1000]); # Robert Israel, Jun 20 2018
MATHEMATICA
Select[Range[0, 750], BitXor[2#, 9#]==11#&] (* Harvey P. Dale, Aug 06 2018 *)
PROG
(PARI) is(n)=bitxor(2*n, 9*n)==11*n \\ Charles R Greathouse IV, Sep 25 2024
CROSSREFS
KEYWORD
nonn,changed
AUTHOR
Antti Karttunen, Feb 01 2006
STATUS
approved