id:A121388 - OEIS Search Results

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Triangular array which classifies the proper odd numbers by form (cf. A120027).

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3, 5, 7, 9, 13, 11, 15, 21, 17, 19, 25, 35, 33, 29, 23, 27, 65, 39, 49, 37, 31, 45, 63, 85, 51, 57, 41, 43, 75, 105, 99, 145, 55, 69, 53, 47, 81 (list; table; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`65 = 5 * 13` `mod(5,4) = 1` `mod(13,4) = 1` `so 65 is in the subsequence A121387 = 25 65 85 145 169 ...`
	CROSSREFS	`Cf. A120027. Subsequences begin A002145 A002144 A107978 A080774 A121387.` `Sequence in context: A122643 A096231 A100432 this_sequence A063081 A067031 A029740` `Adjacent sequences: A121385 A121386 A121387 this_sequence A121389 A121390 A121391`
	KEYWORD	`easy,more,nonn,tabl`
	AUTHOR	`Alford Arnold (Alford1940(AT)aol.com), Jul 26 2006`

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Last modified September 6 09:40 EDT 2008. Contains 143480 sequences.

AT&T Labs Research