The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

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