%I A160407
%S A160407 1,1,2,2,2,2,4,4,2,2,4,4,4,6,10,8,2,2,4,4,4,6,10,8,4,6,10,10,12,20,26,
               16,
%T A160407 2,2,4,4,4,6,10,8,4,6,10,10,12,20,26,16,4,6,10,10,12,20,26,18,12,20,28,
%U A160407 30,42
%N A160407 First differences of toothpick numbers A160406.
%C A160407 Number of toothpick placed in the sieve at round n.
%e A160407 Contribution from Omar E. Pol (info(AT)polprimos.com), Jul 18 2009: (Start)
%e A160407 If written as a triangle:
%e A160407 1;
%e A160407 1;
%e A160407 2,2;
%e A160407 2,2,4,4;
%e A160407 2,2,4,4,4,6,10,8;
%e A160407 2,2,4,4,4,6,10,8,4,6,10,10,12,20,26,16;
%e A160407 2,2,4,4,4,6,10,8,4,6,10,10,12,20,26,16,4,6,10,10,12,20,26,18,12,20,28,
               30,42;...
%e A160407 (End)
%Y A160407 Cf. A139250, A139251, A153000, A153006, A152980, A160406.
%Y A160407 Cf. A161830, A161831. [From Omar E. Pol (info(AT)polprimos.com), Jul 
               18 2009]
%Y A160407 Sequence in context: A051464 A060632 A151565 this_sequence A007457 A119802 
               A060369
%Y A160407 Adjacent sequences: A160404 A160405 A160406 this_sequence A160408 A160409 
               A160410
%K A160407 nonn
%O A160407 1,3
%A A160407 Omar E. Pol (info(AT)polprimos.com), May 23 2009
%E A160407 More terms from N. J. A. Sloane, Jul 17 2009