A133498 - OEIS

This site is supported by donations to The OEIS Foundation.

A133498

Floor(sqrt(pi(2^n))).

0, 1, 1, 2, 2, 3, 4, 5, 7, 9, 13, 17, 23, 32, 43, 59, 80, 110, 151, 208, 286, 394, 544, 751, 1038, 1436, 1989, 2757, 3825, 5309, 7375, 10251, 14257, 19839, 27621, 38473, 53613, 74742, 104241, 145436, 202985, 283401, 395804, 552957, 772733, 1080160, 1510297 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	FORMULA	`a(n) = floor(sqrt(A007053[n]))`
	EXAMPLE	`a(4)=2 because pi(2^4)=6 and the greatest integer less than or equal to sqrt(6) is 2.`
	CROSSREFS	`Cf. A007053.` `Sequence in context: A173090 A032277 A205579 * A097600 A173674 A018128` `Adjacent sequences: A133495 A133496 A133497 * A133499 A133500 A133501`
	KEYWORD	`nonn`
	AUTHOR	`Andrew V. Sutherland (drew(AT)math.mit.edu), Dec 01 2007`

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

Last modified February 15 04:56 EST 2012. Contains 205694 sequences.