id:A092249 - OEIS Search Results

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Positions of the integers in the standard diagonal enumeration of the rationals (with the integers in the first column and diagonals moving up to the right).

+0
1

1, 2, 4, 6, 10, 12, 18, 20, 26, 28, 38, 40 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`The partial recurrence a(2k+2) = a(2k+1) + 2 is evident.`
	EXAMPLE	`The first few terms of the full enumeration are 1, 2, 1/2, 3, 1/3, 4, 3/2, 2/3, 1/4, 5, giving a(n) = 1, 2, 4, 6, 10,...`
	CROSSREFS	`Sequence in context: A033868 A045954 A072542 this_sequence A002088 A019332 A002491` `Adjacent sequences: A092246 A092247 A092248 this_sequence A092250 A092251 A092252`
	KEYWORD	`nonn`
	AUTHOR	`Andy Niedermaier (aniedermaier(AT)hmc.edu), Feb 20 2004`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

AT&T Labs Research