%I A074364
%S A074364 0,1,1,2,1,4,2,7,1,10,4,15,2,21,7,30,1,38,10,49,4,63,15,82,2,99,21,122,
%T A074364 7,150,30,187,1,218,38,257,10,305,49,364,4,417,63,484,15,562,82,659,2,
%U A074364 743,99,844,21,964,122,1107,7,1236,150,1393,30,1573,187,1790,1,1978,218
%N A074364 Semi-tribonacci numbers, from tribonacci by analogy with semi-fibonacci 
               sequence.
%H A074364 T. D. Noe, <a href="b074364.txt">Table of n, a(n) for n = 0..10000</a>
%H A074364 M. J. Halm, <a href="http://untilheaven.tripod.com/id112.htm">Sequences</
               a>
%F A074364 a(0) = 0, a(1) = 1, a(2n) = a(n), a(2n+1) = a(2n)+a(2n-1)+a(2n-2)
%e A074364 a(4)=1 because a(4/2)=a(2)=1.
%Y A074364 Cf. A030067, A000073.
%Y A074364 Sequence in context: A161268 A007690 A143375 this_sequence A008796 A079966 
               A101707
%Y A074364 Adjacent sequences: A074361 A074362 A074363 this_sequence A074365 A074366 
               A074367
%K A074364 nonn
%O A074364 0,4
%A A074364 Michael Joseph Halm (hierogamous(AT)lycos.com), Feb 13 2003