OFFSET
0,3
EXAMPLE
6 in binary is 110. Checking the multiples of a(5)=84: 1*84 = 84 = 1010100 in binary. 110 does not occur. 2*84 = 168 = 10101000 in binary. 110 does not occur. But 3*84 = 252 = 11111100 in binary. 110 occurs in this like so: 1111(110)0. So a(6) = 252.
MAPLE
contai := proc(a, n) verify(convert(n, base, 2), convert(a, base, 2), sublist) ; end: A141288 := proc(n) option remember; local k ; if n= 0 then 1; else for k from 1 do if contai(k*procname(n-1), n) then RETURN( k*procname(n-1) ) ; fi; od: fi; end: seq(A141288(n), n=0..40) ; # R. J. Mathar, Feb 19 2009
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Leroy Quet, Aug 01 2008
EXTENSIONS
Extended by R. J. Mathar, Feb 19 2009
STATUS
approved