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%I #2 Mar 30 2012 17:34:03
%S 2,-1,5,-3,2,-1,8,-5,4,-3,2,-1,11,-7,6,-5,4,-3,2,-1,14,-9,8,-7,6,-5,4,
%T -3,2,-1,17,-11,10,-9,8,-7,6,-5,4,-3,2,-1,20,-13,12,-11,10,-9,8,-7,6,
%U -5,4,-3,2,-1,23,-15,14,-13,12,-11,10,-9,8,-7,6,-5,4,-3,2,-1,26,-17,16,-15
%N Triangle read by rows in which row n lists 3n-1 together with the first 2n-1 numbers <> 0 of A038608, in reverse order.
%C Absolute values give A171176.
%C Note that the partial sums of this sequence give A171178, a permutation of the natural numbers.
%e Triangle begins:
%e 2, -1;
%e 5, -3, 2, -1;
%e 8, -5, 4, -3, 2, -1;
%e 11,-7, 6, -5, 4, -3, 2, -1;
%e 14,-9, 8, -7, 6, -5, 4, -3, 2, -1;
%e 17,-11,10,-9, 8, -7, 6, -5, 4, -3, 2, -1;
%e 20,-13,12,-11,10,-9, 8, -7, 6, -5, 4, -3, 2, -1;
%e 23,-15,14,-13,12,-11,10,-9, 8, -7, 6, -5, 4, -3, 2, -1;
%e 26,-17,16,-15,14,-13,12,-11,10,-9, 8, -7, 6, -5, 4, -3, 2, -1;
%Y Cf. A016789, A038608, A172310, A171164, A161165, A161166, A171172, A171173, A171174, A171175, A171176, A171178.
%K easy,sign,tabf
%O 1,1
%A _Omar E. Pol_, Feb 23 2010
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