id:A056067 - OEIS Search Results

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Numbers n such that n! is divisible by the square of (f+d)!^2 for d=0 and d=1 (and possibly larger d), where f=floor[n/2]

+0
2

1, 10, 11, 28, 29, 54, 55, 82, 83, 88, 89, 130, 131, 152, 153, 180, 181, 218, 219, 250, 251, 278, 279, 304, 305, 310, 311, 338, 339, 372, 373, 378, 379, 406, 407, 416, 417, 418, 419, 438, 439, 454, 455, 460, 461, 474, 475, 530, 531, 550, 551, 596, 597, 614 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Observe that all terms (except 1) are number-pairs starting with with even number (e.g. 88,89).`
	EXAMPLE	`For n=10 and 11, 10! or 11! are divided both by 5!^2 and 6!^2.`
	CROSSREFS	`Cf. A056038-A056044, A056068.` `Sequence in context: A082517 A136828 A136833 this_sequence A086458 A098795 A108580` `Adjacent sequences: A056064 A056065 A056066 this_sequence A056068 A056069 A056070`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jul 26 2000`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

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