login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A104803 "Floor of hypotenuses": a(n) = floor(sqrt(a(n-1)^2 + a(n-2)^2)), a(1)=1, a(2)=3. 9
1, 3, 3, 4, 5, 6, 7, 9, 11, 14, 17, 22, 27, 34, 43, 54, 69, 87, 111, 141, 179, 227, 289, 367, 467, 593, 754, 959, 1219, 1551, 1972, 2508, 3190, 4057, 5160, 6563, 8348, 10618, 13506, 17180, 21853, 27797, 35358, 44976, 57210, 72772, 92567, 117747, 149776 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

a[n_] := a[n] = Floor[ Sqrt[ a[n - 1]^2 + a[n - 2]^2]]; a[1] = 1; a[2] = 3; Table[ a[n], {n, 49}] (* Robert G. Wilson v, Mar 28 2005 *)

nxt[{a_, b_}]:={b, Floor[Sqrt[a^2+b^2]]}; Transpose[NestList[nxt, {1, 3}, 50]] [[1]] (* Harvey P. Dale, Oct 29 2012 *)

CROSSREFS

Cf. A104804, A104805.

Sequence in context: A063197 A327226 A011977 * A104804 A240207 A144489

Adjacent sequences:  A104800 A104801 A104802 * A104804 A104805 A104806

KEYWORD

nonn

AUTHOR

Zak Seidov, Mar 26 2005

EXTENSIONS

More terms from Robert G. Wilson v, Mar 28 2005

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 17 22:05 EDT 2019. Contains 328134 sequences. (Running on oeis4.)