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⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Eight bishops and one elephant on a 3 X 3 chessboard. G.f.: (1+x-5*x^2)/(1-3*x-x^2+6*x^3).
#25 by Harvey P. Dale at Wed Dec 25 13:25:55 EST 2024
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#24 by Harvey P. Dale at Wed Dec 25 13:25:52 EST 2024
MATHEMATICA
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#23 by Michael De Vlieger at Wed Feb 01 08:19:10 EST 2023
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#22 by Michel Marcus at Wed Feb 01 02:26:39 EST 2023
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#21 by Stefano Spezia at Tue Jan 31 16:02:20 EST 2023
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#20 by Stefano Spezia at Tue Jan 31 15:19:48 EST 2023
CROSSREFS
#19 by Stefano Spezia at Tue Jan 31 15:16:46 EST 2023
FORMULA
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#18 by Michael De Vlieger at Mon Aug 01 08:21:31 EDT 2022
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#17 by Jon E. Schoenfield at Mon Aug 01 04:18:37 EDT 2022
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#16 by Jon E. Schoenfield at Mon Aug 01 04:18:34 EDT 2022
COMMENTS
FORMULA
PROG
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