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 A242179 T(0,0) = 1, T(n+1,2*k) = - T(n,k), T(n+1,2*k+1) = T(n,k), k=0..n, triangle read by rows. 8
 1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0 COMMENTS Row n has 2^n terms; sum of row n = 0 for n > 0, cf. A000007; numerator of Bernoulli tree, see Woon link; denominators = A106831. LINKS Reinhard Zumkeller, Rows n = 0..12 of table, flattened S. C. Woon, A tree for generating Bernoulli numbers, Math. Mag., 70 (1997), 51-56. PROG (Haskell) a242179  n k = a242179_tabf !! n !! n a242179_row n = a242179_tabf !! n a242179_tabf = iterate (concatMap (\x -> [-x, x])) [1] :: (Num t => [[t]]) a242179_list = concat a242179_tabf CROSSREFS Cf. A060054, A075180, A164555, A027642. Sequence in context: A070748 A154990 A209615 * A319117 A210245 A210247 Adjacent sequences:  A242176 A242177 A242178 * A242180 A242181 A242182 KEYWORD sign,tabf,frac AUTHOR Reinhard Zumkeller, Jul 04 2014 STATUS approved

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Last modified June 1 03:14 EDT 2020. Contains 334758 sequences. (Running on oeis4.)