A048246 - OEIS

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A048246

Number of distinct 3-colorings (X, O and blank) of 3 by 3 grid with (Floor[ n/2 ] + Mod[ n,2 ]) X's, Floor[ n/2 ] O's and 9 - n blanks.

1, 3, 12, 38, 108, 174, 228, 174, 89, 23 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Number of tic-tac-toe positions after n plays if game is allowed to continue after the win, up to rotation and reflection. Gives upper bound on distinct tic-tac-toe positions after n plays (A008907).`
	LINKS	`Index entries for sequences related to tic-tac-toe`
	CROSSREFS	`A008907, A048245.` `Sequence in context: A083215 A022727 A008907 * A129014 A055294 A029858` `Adjacent sequences: A048243 A048244 A048245 * A048247 A048248 A048249`
	KEYWORD	`fini,full,nonn`
	AUTHOR	`Robert W. Pratt (Rob.Pratt(AT)sas.com)`

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Last modified February 16 15:57 EST 2012. Contains 205935 sequences.