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 A171177 Triangle read by rows in which row n lists 3n-1 together with the first 2n-1 numbers <> 0 of A038608, in reverse order. 9

%I

%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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Last modified May 25 08:34 EDT 2020. Contains 334585 sequences. (Running on oeis4.)