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A123708 a(n) = sum of unsigned elements in row n of triangle A123706. 3
1, 3, 3, 4, 3, 5, 3, 4, 4, 7, 3, 8, 3, 7, 7, 4, 3, 8, 3, 8, 7, 7, 3, 8, 4, 7, 4, 8, 3, 13, 3, 4, 7, 7, 7, 8, 3, 7, 7, 8, 3, 13, 3, 8, 8, 7, 3, 8, 4, 8, 7, 8, 3, 8, 7, 8, 7, 7, 3, 16, 3, 7, 8, 4, 7, 13, 3, 8, 7, 15, 3, 8, 3, 7, 8, 8, 7, 13, 3, 8, 4, 7, 3, 16, 7, 7, 7, 8, 3, 16, 7, 8, 7, 7, 7, 8, 3, 8, 8, 8, 3, 13 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Triangle A123706 is the matrix inverse of triangle A010766, where A010766(n,k) = [n/k].

PROG

(PARI) {a(n)=local(M=matrix(n, n, r, c, if(r>=c, floor(r/c)))^-1); sum(k=1, n, abs(M[n, k]))}

CROSSREFS

Cf. A123706, A123707, A123709; A010766.

Sequence in context: A175928 A161357 A138372 * A102302 A130896 A029882

Adjacent sequences:  A123705 A123706 A123707 * A123709 A123710 A123711

KEYWORD

nonn

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com), Oct 09 2006

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Last modified February 15 18:14 EST 2012. Contains 205835 sequences.