id:A120669 - OEIS Search Results

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A120669

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

+0
3

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

	OFFSET	`1,2`
	COMMENT	`For a circle with radius r, the measurement in radians of the central angle with endpoints on the circle that are r4/Pi apart: The average central angle (<= Pi) 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.`
	EXAMPLE	`1.38021418274907990400875581814...`
	PROGRAM	`(PARI) acos(1-8/Pi^2)`
	CROSSREFS	`Cf. A088538, A120670 (same in degrees), A120671 (A120669/2Pi).` `Adjacent sequences: A120666 A120667 A120668 this_sequence A120670 A120671 A120672` `Sequence in context: A137029 A137125 A103319 this_sequence A021267 A086106 A010626`
	KEYWORD	`cons,nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 22 2006`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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