id:A060401 - OEIS Search Results

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a(n) = minimal m such that m>n, n divides m, n-1 divides m-1, n-2 divides m-2 and so on down to 1 divides m-n+1.

+0
6

2, 4, 9, 16, 65, 66, 427, 848, 2529, 2530, 27731, 27732, 360373, 360374, 360375, 720736, 12252257, 12252258, 232792579, 232792580, 232792581, 232792582, 5354228903, 5354228904, 26771144425, 26771144426, 80313433227, 80313433228 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = n + lcm(seq(i, i=1..n))`
	EXAMPLE	`a(5) = 65 because 5\|65, 4\|64, 3\|63, 2\|62, 1\|61 and 65 is minimal.`
	CROSSREFS	`Right-most diagonal of triangle in A075059. Cf. A075061, A075062.` `Sequence in context: A128093 A056331 A056336 this_sequence A063981 A131095 A136379` `Adjacent sequences: A060398 A060399 A060400 this_sequence A060402 A060403 A060404`
	KEYWORD	`nonn`
	AUTHOR	`Christopher Burrows (cburrows(AT)math.upenn.edu), Apr 04 2001`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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