login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A187327 a(n) = floor(n/5) + floor(2n/5) + floor(3n/5). 0
0, 0, 1, 2, 3, 6, 6, 7, 8, 9, 12, 12, 13, 14, 15, 18, 18, 19, 20, 21, 24, 24, 25, 26, 27, 30, 30, 31, 32, 33, 36, 36, 37, 38, 39, 42, 42, 43, 44, 45, 48, 48, 49, 50, 51, 54, 54, 55, 56, 57, 60, 60, 61, 62, 63, 66, 66, 67, 68, 69, 72, 72, 73, 74, 75, 78, 78, 79, 80, 81, 84, 84, 85, 86, 87, 90, 90, 91, 92, 93, 96, 96, 97, 98, 99, 102, 102, 103, 104, 105, 108, 108, 109, 110, 111, 114, 114, 115, 116, 117, 120, 120, 121, 122, 123, 126, 126, 127, 128, 129, 132, 132, 133, 134, 135, 138, 138, 139, 140, 141, 144 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
FORMULA
a(n) = floor(n/5)+floor(2n/5)+floor(3n/5).
a(n)= +a(n-1) +a(n-5) -a(n-6). G.f. ( x^4*(1+x+x^2+3*x^3) ) / ( (x^4+x^3+x^2+x+1)*(x-1)^2 ). - R. J. Mathar, Mar 18 2011
MATHEMATICA
Table[Floor[n/5]+Floor[2n/5]+Floor[3n/5], {n, 0, 120}]
LinearRecurrence[{1, 0, 0, 0, 1, -1}, {0, 0, 1, 2, 3, 6}, 130] (* Harvey P. Dale, Sep 26 2016 *)
PROG
(PARI) a(n)=n\5+2*n\5+3*n\5 \\ Charles R Greathouse IV, Mar 17 2011
CROSSREFS
Sequence in context: A333936 A193896 A099162 * A271716 A362706 A220178
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Mar 08 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 11:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)