A048245 Number of distinct terminal tic-tac-toe positions after n plays, up to rotation and reflection.

0, 0, 0, 0, 0, 21, 21, 58, 23, 15

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: A040421 A022355 A371100 * 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