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).
Table of n, a(n) for n=1..9.
A column of A195738.
Sequence in context: A159659 A100868 A171410 * A213798 A219102 A219981
Adjacent sequences: A006758 A006759 A006760 * A006762 A006763 A006764
nonn
N. J. A. Sloane.
approved
