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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A184102 n+floor(4*sqrt(n)); complement of A184103. 2
5, 7, 9, 12, 13, 15, 17, 19, 21, 22, 24, 25, 27, 28, 30, 32, 33, 34, 36, 37, 39, 40, 42, 43, 45, 46, 47, 49, 50, 51, 53, 54, 55, 57, 58, 60, 61, 62, 63, 65, 66, 67, 69, 70, 71, 73, 74, 75, 77, 78, 79, 80, 82, 83, 84, 85, 87, 88, 89, 90, 92, 93, 94, 96, 97, 98, 99, 100, 102, 103, 104, 105, 107, 108, 109, 110, 112, 113, 114, 115, 117, 118, 119, 120, 121, 123, 124, 125, 126, 127, 129, 130, 131, 132, 133, 135, 136, 137, 138, 140 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..100.

FORMULA

a(n)=n+floor(4*sqrt(n)).

MATHEMATICA

a=16; b=0;

Table[n+Floor[(a*n+b)^(1/2)], {n, 100}]

Table[n-1+Ceiling[(n*n-b)/a], {n, 80}]

Table[n+Floor[4Sqrt[n]], {n, 100}] (* Harvey P. Dale, Jun 21 2015 *)

CROSSREFS

Cf. A184103.

Sequence in context: A045236 A029664 A188793 * A285915 A075329 A177031

Adjacent sequences:  A184099 A184100 A184101 * A184103 A184104 A184105

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jan 09 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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 25 19:28 EDT 2020. Contains 338012 sequences. (Running on oeis4.)