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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A194245 [sum{(rk) : 1<=k<=n}], where [ ]=floor, ( )=fractional part, and r=2-sqrt(3). 2
 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 7, 7, 7, 8, 8, 9, 9, 10, 10, 11, 12, 13, 13, 13, 14, 14, 14, 15, 16, 16, 16, 17, 18, 18, 19, 19, 20, 20, 21, 22, 22, 22, 23, 24, 24, 24, 25, 26, 26, 26, 27, 27, 27, 28, 29, 29, 29, 30, 31, 31, 31, 32, 33, 33, 34, 34, 34, 35, 35 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 LINKS MATHEMATICA r = 2-Sqrt[3]; a[n_] := Floor[Sum[FractionalPart[k*r], {k, 1, n}]] Table[a[n], {n, 1, 90}]    (* A194245 *) s[n_] := Sum[a[k], {k, 1, n}] Table[s[n], {n, 1, 100}]   (* A194246 *) CROSSREFS Cf. A194246. Sequence in context: A286041 A027192 A194255 * A317648 A284007 A261133 Adjacent sequences:  A194242 A194243 A194244 * A194246 A194247 A194248 KEYWORD nonn AUTHOR Clark Kimberling, Aug 20 2011 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 June 14 12:04 EDT 2021. Contains 345025 sequences. (Running on oeis4.)