%I N1623 #9 Jul 27 2015 20:49:31
%S 1,5,25,149,1081,9366,94586,1091670,14174522,204495125
%N Erroneous version of A002050.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%H G. J. Simmons, <a href="http://www.jstor.org/stable/2689153">A combinatorial problem associated with a family of combination locks</a>, Math. Mag., 37 (1964), 127-132 (but there are errors).
%H G. J. Simmons, <a href="/A002050/a002050.pdf">A combinatorial problem associated with a family of combination locks</a>, Math. Mag., 37 (1964), 127-132 [Annotated, corrected, scanned copy]
%K dead
%O 0,2
%A _N. J. A. Sloane_, Jul 27 2015