id:A106840 - OEIS Search Results

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Numbers n such that both n and n+1 have odd part of form 4k+1.

+0
3

1, 4, 8, 9, 16, 17, 20, 25, 32, 33, 36, 40, 41, 49, 52, 57, 64, 65, 68, 72, 73, 80, 81, 84, 89, 97, 100, 104, 105, 113, 116, 121, 128, 129, 132, 136, 137, 144, 145, 148, 153, 160, 161, 164, 168, 169, 177, 180, 185, 193, 196, 200, 201, 208, 209, 212, 217, 225 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`20/4=5 is 1 mod 4 and so is 21, therefore 20 is in sequence.`
	CROSSREFS	`Cf. A091072, A106841, A106837.` `Contains A106841 and A106841+1.` `Sequence in context: A072103 A004756 A153034 this_sequence A140612 A160053 A034023` `Adjacent sequences: A106837 A106838 A106839 this_sequence A106841 A106842 A106843`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan, May 03 2005`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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