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 A130209 Diagonalized matrix of d(n), A000005. 8
 1, 0, 2, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS FORMULA T(n,n) = A000005(n), T(n,k) = 0 if n <> k. EXAMPLE First few rows of the triangle are: 1; 0, 2; 0, 0, 2; 0, 0, 0, 3; 0, 0, 0, 0, 2; 0, 0, 0, 0, 0, 4; ... MAPLE A130209 := proc(n, k)     if k = n then         numtheory[tau](n);     else         0;     end if; end proc: # R. J. Mathar, Aug 06 2016 CROSSREFS Cf. A000005, A130207, A130209. Sequence in context: A242609 A226225 A329265 * A109127 A263456 A002284 Adjacent sequences:  A130206 A130207 A130208 * A130210 A130211 A130212 KEYWORD nonn,tabl,easy AUTHOR Gary W. Adamson, May 16 2007 STATUS approved

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Last modified December 5 10:45 EST 2019. Contains 329751 sequences. (Running on oeis4.)