id:A121490 - OEIS Search Results

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Rectangular array T by antidiagonals: T(n,k) = [y+1]^2-y^2, where y=n*sqrt(k) and [ ] denotes the floor function.

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3, 2, 5, 1, 1, 7, 5, 4, 7, 9, 4, 9, 9, 4, 11, 3, 5, 13, 1, 14, 13, 2, 1, 4, 17, 6, 9, 15, 1, 8, 10, 1, 21, 13, 2, 17, 7, 4, 1, 4, 19, 25, 22, 16, 19, 6, 13, 9, 9, 19, 16, 29, 4, 7, 21, 5, 9, 19, 16, 21, 9, 11, 33, 13, 25, 23, 4, 5, 10, 25, 25, 4, 30, 4, 37, 24, 14, 25, 3, 1, 1, 9, 31, 1, 18, 16 (list; table; graph; listen)

	OFFSET	`1,1`
	COMMENT	`(Row 1)=A080883; (Column 1)=A005408 except for initial term; (Column 2)=A087059; (Column 3)=A120865; (Column 4)=A016813 except for initial term; (Column 5)=A120867; Columns 1,4,9,16,25,... are arithmetic sequences; (Main diagonal)=A121489.`
	FORMULA	`T(n,k) = [y+1]^2-y^2`
	EXAMPLE	`Northwest corner:` `3 2 1 5 4` `5 1 4 9 5` `7 7 9 13 4` `9 4 1 17 1`
	CROSSREFS	`Sequence in context: A083254 A068453 A111986 this_sequence A099643 A113260 A051543` `Adjacent sequences: A121487 A121488 A121489 this_sequence A121491 A121492 A121493`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu), Aug 02 2006`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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