1,1
S. K. Stein and S. Szabo, Algebra and Tiling, MAA Carus Monograph 25, 1994, page 77.
Sequence in context: A001544 A202152 A136720 * A046519 A128351 A192894
Adjacent sequences: A035027 A035028 A035029 * A035031 A035032 A035033
nonn
N. J. A. Sloane (njas(AT)research.att.com).