OFFSET
1,2
COMMENTS
Numbers which, written in base 49, have only digits 0 through 6 and no two adjacent digits equal. - M. F. Hasler, Feb 03 2014
PROG
(PARI) is_A043311(n)=(n=[n])&&!until(!n[1], ((n=divrem(n[1], 49))[2]<7 && n[1]%7!=n[2])||return) \\ M. F. Hasler, Feb 03 2014
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved