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A171075 Total number of balls on lawn in variant of the tennis ball problem (cf. A171074); 1

%I #2 Mar 30 2012 16:51:55

%S 1,20,190,1226,6878,35962,180080

%N Total number of balls on lawn in variant of the tennis ball problem (cf. A171074);

%C Apparently equals A051133(n) - A005893(n) after 1st term.

%C Note that A051133 yields the totals of all C(2n, n) ball sets and A005893 and A090288 are the respective totals of impossible combinations given the rules.

%D David Scambler, Just for fun, more tennis balls, Posting to the Sequence Fans Mailing List, Aug 25 2010.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Sep 06 2010

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)