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A285877
Number of possible chess games at the end of the n-th ply starting without pawns.
7
1, 50, 2125, 96062, 4200525, 191462298, 8509434855, 390020597683
OFFSET
0,2
COMMENTS
Gives the number of possible chess games where both sides start without pawns.
Does not include games which end in fewer than n plies.
The initial terms exceed the corresponding terms in A048987, but this should eventually reverse and we should have A285877(n) <= A048987(n) for large enough n.
Initial terms computed using the Chesspresso engine.
CROSSREFS
Cf. A048987 (standard), A285873 (no queens), A285874 (no rooks), A285875 (no knights), A285876 (no bishops), A285878 (pawns and king).
Sequence in context: A238283 A240191 A231696 * A156087 A162919 A163290
KEYWORD
nonn,hard,more,fini
AUTHOR
Sean A. Irvine, Apr 28 2017
STATUS
approved