id:A161833 - OEIS Search Results

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First differences of A161832.

+0
4

1, 1, 2, 1, 2, 2, 4, 2, 2, 2, 4, 3, 4, 5, 9, 5, 2 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Number of Y-toothpicks added to the sieve at the n-th round.`
	FORMULA	`a(n) = A161831(n+1)/2.`
	CROSSREFS	`Cf. A139251, A160121, A160407, A161830, A161831, A161832.` `Sequence in context: A158379 A122838 A050378 this_sequence A139318 A054541 A102722` `Adjacent sequences: A161830 A161831 A161832 this_sequence A161834 A161835 A161836`
	KEYWORD	`more,nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Jun 20 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.