id:A160842 - OEIS Search Results

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Number of lines through at least 2 points of an 2 X n grid of points

+0
1

0, 1, 6, 11, 18, 27, 38, 51, 66, 83, 102, 123, 146, 171, 198, 227, 258, 291, 326, 363, 402, 443, 486, 531, 578, 627, 678, 731, 786, 843, 902, 963, 1026, 1091, 1158, 1227, 1298, 1371, 1446, 1523, 1602, 1683, 1766, 1851, 1938, 2027, 2118, 2211, 2306, 2403, 2502 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(n)=A059100(n) for n>1`
	LINKS	`S. Mustonen, On lines and their intersection points in a rectangular grid of points`
	FORMULA	`a(n)=n^2+2`
	MATHEMATICA	`a[n_]:=If[n<2, n, n^2+2] Table[a[n], {n, 0, 50}]`
	CROSSREFS	`Sequence in context: A073945 A083500 A102305 this_sequence A007745 A021011 A000382` `Adjacent sequences: A160839 A160840 A160841 this_sequence A160843 A160844 A160845`
	KEYWORD	`nonn`
	AUTHOR	`Seppo Mustonen (seppo.mustonen(AT)helsinki.fi), May 28 2009`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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