A056646 - OEIS

This site is supported by donations to The OEIS Foundation.

A056646

Square root of largest unitary square divisor of central binomial coefficient.

1, 1, 1, 1, 1, 2, 1, 1, 3, 6, 1, 2, 2, 1, 3, 3, 1, 2, 1, 2, 2, 1, 1, 2, 10, 5, 10, 5, 3, 12, 3, 3, 1, 2, 5, 10, 10, 5, 3, 6, 2, 1, 2, 1, 5, 20, 15, 30, 42, 21, 14, 7, 7, 28, 2, 1, 1, 4, 1, 4, 4, 2, 21, 21, 7, 14, 7, 14, 6, 3, 1, 2, 2, 1, 10, 5, 35, 140, 7, 14, 126, 63, 2, 1, 5, 20, 90, 45, 3, 12 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,6`
	FORMULA	`a(n)=A000188[A001405(n)]/A055229[A001405(n)]= A056056(n)/A056059(n)`
	EXAMPLE	`n=28, binomial[28,14]=2.2.2.3.3.3.5.5.17.19.23. The square root of its largest square divisor is 30, while the largest unitary analogue is a(28)=30/6=5.`
	CROSSREFS	`A000188, A001405, A055229, A056056, A056059.` `Sequence in context: A156582 A156953 A156881 * A056056 A136462 A060517` `Adjacent sequences: A056643 A056644 A056645 * A056647 A056648 A056649`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Aug 09 2000`

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

Last modified February 14 19:37 EST 2012. Contains 205663 sequences.