A309340 a(n) is the least nonnegative number whose binary digits do not appear in order (not necessarily consecutively) in the concatenation of the binary representations of all previous terms.

0, 1, 2, 4, 9, 38, 304, 2433, 38938, 2492040, 318981139, 163318343502

Offset

1,3

Comments

This sequence is a variant of A118248.

a(13) > 4.5*10^12. - Giovanni Resta, Aug 08 2019

Links

Table of n, a(n) for n=1..12.

Crossrefs

See A308540 for the decimal variant.

Cf. A118248.

Sequence in context: A242986 A327057 A151891 * A005204 A204428 A162111

Adjacent sequences: A309337 A309338 A309339 * A309341 A309342 A309343

Keyword

nonn,base,hard,more

Author

Rémy Sigrist, Jul 24 2019

Extensions

a(12) from Giovanni Resta, Aug 08 2019

Status

approved