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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A073273 Floor(SquareRoot(prime(n)*prime(n+2))). 3
3, 4, 7, 9, 13, 15, 19, 23, 26, 32, 35, 39, 43, 47, 52, 56, 62, 65, 69, 74, 77, 83, 89, 94, 99, 103, 105, 109, 117, 121, 131, 134, 142, 144, 152, 156, 161, 167, 172, 176, 184, 186, 193, 195, 203, 210, 218, 225, 229, 233, 236, 244, 248, 256, 262, 266, 272, 275 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

A000040(n) < a(n) < A000040(n+2);

EXAMPLE

A000040(10)*A000040(12) = 29*37 = 1073 = 32*32+49, therefore a(10)=32; A073274(10) = A000040(11)-a(10) = 31-32 = -1.

CROSSREFS

Cf. A000040, A073271, A073274.

Sequence in context: A005539 A203623 A053099 * A072441 A152032 A004652

Adjacent sequences:  A073270 A073271 A073272 * A073274 A073275 A073276

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 22 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 10:06 EST 2012. Contains 205763 sequences.