login

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A172329
a(n) = floor(n*(sqrt(11) + sqrt(2))).
1
0, 4, 9, 14, 18, 23, 28, 33, 37, 42, 47, 52, 56, 61, 66, 70, 75, 80, 85, 89, 94, 99, 104, 108, 113, 118, 123, 127, 132, 137, 141, 146, 151, 156, 160, 165, 170, 175, 179, 184, 189, 193, 198, 203, 208, 212, 217, 222, 227, 231, 236
OFFSET
0,2
COMMENTS
Also integer part of n*4.7308383527..., where the constant is the largest root of x^4 - 26*x^2 + 81.
LINKS
MAPLE
a:=n->floor(n*(sqrt(11)+sqrt(2))): seq(a(n), n=0..60); # Muniru A Asiru, Sep 28 2018
MATHEMATICA
With[{c=Sqrt[11]+Sqrt[2]}, Table[Floor[c n], {n, 0, 50}]] (* Harvey P. Dale, Mar 12 2011 *)
PROG
(Magma) [Floor(n*(Sqrt(11)+Sqrt(2))): n in [0..60]];
(PARI) vector(60, n, n--; floor(n*(sqrt(11)+sqrt(2)))) \\ G. C. Greubel, Sep 28 2018
KEYWORD
nonn,easy,less
AUTHOR
Vincenzo Librandi, Feb 01 2010
STATUS
approved