1,4
R. K. Guy, O'Beirne's Hexiamond, in The Mathemagician and the Pied Puzzler - A Collection in Tribute to Martin Gardner, Ed. E. R. Berlekamp and T. Rogers, A. K. Peters, 1999, 85-96.
Sequence in context: A026521 A202618 A006534 * A010364 A110391 A197460
Adjacent sequences: A064032 A064033 A064034 * A064036 A064037 A064038
dead