1,6
W. F. Lunnon, Counting multidimensional polyominoes. Computer Journal 18 (1975), no. 4, pp. 366-367.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
A column of A195738.
Sequence in context: A159659 A100868 A171410 * A144683 A141835 A111831
Adjacent sequences: A006758 A006759 A006760 * A006762 A006763 A006764
nonn
N. J. A. Sloane (njas(AT)research.att.com).