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To use this Calculator:

  1. Select Preferences from a Menu item at the top of the screen
  2. Click the box so that Scripting is switched on (ticked)
  3. reload/refresh this page

    4. Runsums Calculator 2.1

    You do not need to be online to use this calculator. Once you have the full page on your screen, you can disconnect from the Internet if you wish.
    A runsum (a trapezoidal number) is the difference between two Triangular numbers and is therefore the sum of a run oF (consecutive, whole) numbers e.g.
    18 = 5+6+7 = (1+2+3+4+5+6+7) - (1+2+3+4) = T(7)-T(4)
    HELP(in a new window): More about runsums | Some calculator examples.

    C A L C U L A T O R
    Italic parts are optional.

    of all the whole numbers
    from up to
    with sum at
    runs
     
    		  runs with a sum   of
    up to
    in the range:
    to:
    that are the sums of   runs
    with runsums
    max

    		with b =
    to
    T()
    up to T()
    		 R E S U L T S
    © 1999-2007 Dr Ron Knott enquiry at ronknott dot com 10 January 2007