%I M0083 #18 Dec 17 2021 11:20:02
%S 1,1,1,1,1,1,2,1,1,8,1,1,1,21,7,1,1
%N Number of translation planes of order q, q = prime power.
%D R. Mathon and Gordon Royle, "Classification of the translation planes of order 49", Designs, Codes and Cryptography, 5 (1995), no. 1, 57-72.
%D T. G. Ostrom, Finite Translation Planes, Lect. Notes Math. 158, 1970.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%K nonn,hard,nice
%O 1,7
%A _N. J. A. Sloane_