id:A120670 - OEIS Search Results

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A120670

Decimal expansion of 180*arccos(1-8/(Pi^2))/Pi.

+0
3

7, 9, 0, 8, 0, 4, 4, 7, 4, 9, 5, 6, 2, 0, 3, 9, 0, 8, 2, 5, 3, 9, 8, 0, 3, 1, 1, 1, 8, 0, 5, 2, 2, 5, 9, 2, 5, 9, 3, 8, 2, 1, 1, 8, 6, 5, 0, 5, 9, 5, 4, 7, 1, 1, 3, 2, 0, 5, 6, 4, 7, 9, 0, 0, 2, 6, 4, 0, 4, 1, 4, 5, 4, 1, 6, 7, 2, 6, 1, 7, 0, 6, 2, 7, 9, 4, 2, 3, 9, 0, 6, 9, 0, 7, 1, 5, 5, 1, 7, 5, 7, 3, 7, 1, 1 (list; cons; graph; listen)

	OFFSET	`2,1`
	COMMENT	`For a circle with radius r, the measurement in degrees of the central angle with endpoints on the circle that are r4/Pi apart: The average central angle (<= 180 degrees) formed using two randomly chosen points on a circle. The average arc length between such endpoints is rA120669 corresponding to the average chord length r*A088538; so, for the unit circle arc length is A120669 and chord length is A088538.`
	FORMULA	`a(n) = 180A120669/Pi = 360A120671.`
	EXAMPLE	`79.0804474956203908253980311180...`
	PROGRAM	`(PARI) 180*acos(1-8/Pi^2)/Pi`
	CROSSREFS	`Cf. A088538, A120669 (same in radians), A120671 (A120670/360).` `Sequence in context: A042499 A156206 A104757 this_sequence A091900 A086318 A130834` `Adjacent sequences: A120667 A120668 A120669 this_sequence A120671 A120672 A120673`
	KEYWORD	`cons,nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 22 2006`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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