A006639 - OEIS

%I M2581 #7 Mar 30 2012 16:45:02

%S 3,6,15,24,33,48,63,90

%N Restricted postage stamp problem.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%D S. S. Wagstaff, Jr., Additive h-bases for n, pp. 302-327 of Number Theory Carbondale 1979, Lect. Notes Math. 751 (1982).

%K nonn

%O 1,1

%A _N. J. A. Sloane_.