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Number of polyhypercubes or 4-dimensional polyominoes with n cells (regarding mirror-images as identical).
23

%I #23 Nov 03 2023 11:21:20

%S 1,1,1,2,7,26,147,1019,8699,82535,846042,9078720

%N Number of polyhypercubes or 4-dimensional polyominoes with n cells (regarding mirror-images as identical).

%H Don Reble, <a href="/A068870/a068870.txt">C++ Program</a>

%Y Excluding a(0), 140th row of A366766.

%Y Cf. A049429, A049430, A255487.

%K hard,nonn,more

%O 0,4

%A _Franklin T. Adams-Watters_, Mar 29 2002

%E a(10) and a(11) from _Don Reble_, Feb 25 2015. - _N. J. A. Sloane_, Mar 01 2015