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A120074 Row sums of triangle A120072 (numerator triangle for H atom spectrum). 1
3, 13, 25, 70, 54, 203, 197, 340, 303, 825, 445, 1378, 892, 1221, 1565, 3128, 1545, 4389, 2427, 3592, 3688, 7843, 3589, 8420, 6191, 9097, 7135, 15834, 5774, 19375, 12493, 14814, 14147, 19647, 12264, 33078 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..37.

FORMULA

a(n)=sum(A120072(m,n),n=1..m-1), m>=2.

MATHEMATICA

Table[Sum[1/n^2 - 1/m^2 // Numerator, {n, 1, m-1}], {m, 2, 40}]  (* Jean-François Alcover, Sep 16 2013 *)

CROSSREFS

Sequence in context: A146371 A146379 A056714 * A056706 A052454 A330718

Adjacent sequences:  A120071 A120072 A120073 * A120075 A120076 A120077

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Jul 20 2006

STATUS

approved

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Last modified December 2 03:43 EST 2021. Contains 349437 sequences. (Running on oeis4.)