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 A167194 Triangle read by rows. A130713 in the columns. 3
 1, 2, 1, 1, 2, 1, 0, 1, 2, 1, 0, 0, 1, 2, 1, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA From Peter Bala, Sep 12 2012: (Start) T(n,k) = binomial(2,n-k). O.g.f.: (1+x)^2/(1-t*x). Riordan array ((1+x)^2,x). Matrix inverse is signed version of A004736. (End) EXAMPLE Table begins: 1, 2,1, 1,2,1, 0,1,2,1, 0,0,1,2,1, 0,0,0,1,2,1, 0,0,0,0,1,2,1, 0,0,0,0,0,1,2,1, 0,0,0,0,0,0,1,2,1, 0,0,0,0,0,0,0,1,2,1, 0,0,0,0,0,0,0,0,1,2,1, CROSSREFS Cf. A130713. A004736. Sequence in context: A014570 A015131 A282716 * A185018 A099075 A307016 Adjacent sequences:  A167191 A167192 A167193 * A167195 A167196 A167197 KEYWORD nonn,tabl AUTHOR Mats Granvik, Oct 30 2009 STATUS approved

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Last modified January 19 17:59 EST 2020. Contains 331051 sequences. (Running on oeis4.)