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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.

Index entries for sequences related to Bernoulli Numbers.

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: A212157 A186039 A262725 * A210245 A210247 A269529

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 February 19 02:06 EST 2018. Contains 299330 sequences. (Running on oeis4.)