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A165435 Number of quad-coverings of a set. 1


%S 1,1,5,81,4079,507549,127126912,55643064708,38715666455777,

%T 40095856807088486,58901884724160709571,118283825763578012358080,

%U 315297447553856723754810322,1089117884184737631305395668913,4778248300569771278502378511288513

%N Number of quad-coverings of a set.

%C Analogous to A165434. See comments and references there.

%Y Row 4 of A188392.

%Y Cf. A165434.

%K nonn

%O 0,3

%A _Doron Zeilberger_, Sep 18 2009

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Last modified November 30 19:14 EST 2022. Contains 358453 sequences. (Running on oeis4.)