id:A049639 - OEIS Search Results

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Array T read by diagonals; T(i,j)=number of lines passing through (i,j) and at least two other lattice points (h,k) satisfying 0<=h<=i, 0<=k<=j.

+0
10

0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 4, 3, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1, 1, 5, 4, 5, 4, 5, 1, 1, 1, 1, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 6, 5, 7, 5, 7, 5, 6, 1, 1, 1, 1, 6, 6, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 7, 6, 8, 7, 9, 7, 8, 6, 7, 1, 1 (list; table; graph; listen)

	OFFSET	`0,13`
	EXAMPLE	`Diagonals (each starting on row 1): {0}; {0,0}; {1,0,1}; ...`
	CROSSREFS	`It appears that A049639(n, k)=A049687(n/2, k/2).` `Sequence in context: A061893 A078530 A010276 this_sequence A046555 A029382 A073780` `Adjacent sequences: A049636 A049637 A049638 this_sequence A049640 A049641 A049642`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.

AT&T Labs Research