This site is supported by donations to The OEIS Foundation.

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A080740 a(n) = number of m such that A080737(m) <= 2n. 5
 2, 5, 9, 17, 24, 35, 48, 62, 82, 108, 138, 180, 223, 272, 336, 401, 483, 578, 685, 814, 957, 1113, 1299, 1502, 1737, 2004, 2299, 2633, 3005, 3420, 3886, 4400, 4981, 5618, 6325, 7108, 7967, 8927, 9982, 11134, 12415, 13805, 15327, 17006, 18830, 20841 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Total number of elements in first n rows of A080738. REFERENCES J. Bamberg, G. Cairns and D. Kilminster, The crystallographic restriction, permutations and Goldbach's conjecture, Amer. Math. Monthly, 110 (March 2003), 202-209. LINKS PROG (Haskell) a080740 n k = a080740_list !! n a080740_list = scanl1 (+) a080739_list  -- Reinhard Zumkeller, Jun 13 2012 CROSSREFS Partial sums of A080739. Sequence in context: A059529 A119676 A036711 * A123324 A167887 A023603 Adjacent sequences:  A080737 A080738 A080739 * A080741 A080742 A080743 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Mar 08 2003 EXTENSIONS More terms from Devin Kilminster (devin(AT)maths.uwa.edu.au), Mar 10 2003 STATUS approved

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

Content is available under The OEIS End-User License Agreement .