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A302187
Number of 3D walks of type bcc.
0
1, 2, 8, 30, 138, 620, 3060, 14910, 76650, 390852, 2063376, 10832052, 58264668, 312123240, 1702423008, 9256786110, 51036229530, 280696824980, 1560925457520, 8663089672380, 48512836025940, 271229902496280, 1527733861191720, 8593482390429300, 48642125421855420, 275014629509319000
OFFSET
0,2
COMMENTS
See Dershowitz (2017) for precise definition.
LINKS
Nachum Dershowitz, Touchard's Drunkard, Journal of Integer Sequences, Vol. 20 (2017), #17.1.5.
KEYWORD
nonn,walk
AUTHOR
N. J. A. Sloane, Apr 09 2018
EXTENSIONS
a(12)-a(25) from Nachum Dershowitz, Aug 03 2020
STATUS
approved