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A048245 Number of distinct terminal tic-tac-toe positions after n plays, up to rotation and reflection. 5
0, 0, 0, 0, 0, 21, 21, 58, 23, 15 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

As in chess, a "play" is an action by a single player, a "move" is two contiguous plays by each opponent.

LINKS

Table of n, a(n) for n=0..9.

Index entries for sequences related to tic-tac-toe

CROSSREFS

Cf. A008907.

Sequence in context: A151910 A040421 A022355 * A246034 A220689 A056485

Adjacent sequences:  A048242 A048243 A048244 * A048246 A048247 A048248

KEYWORD

fini,full,nonn

AUTHOR

Rob Pratt

EXTENSIONS

Name clarified by Álvar Ibeas, Jul 27 2018

STATUS

approved

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Last modified January 20 03:32 EST 2019. Contains 319323 sequences. (Running on oeis4.)