OFFSET
0,3
COMMENTS
Including positions where X has already won (that is, 0 for even n, A048245(n) for odd n up to 7, and 12 for n = 9).
EXAMPLE
a(2) = 7:
x o . x . o x . . x . . . x . . x . . o .
. . . . . . . . o . . . o . . . . . . x .
. . . . . . . . . . . o . . . o . . . . .
CROSSREFS
KEYWORD
fini,full,nonn
AUTHOR
Álvar Ibeas, Jul 27 2018
STATUS
approved