This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A051236 #3 Jan 24 2006 03:00:00 %S A051236 1,1,2,3,5,9,18,40,102,268 %N A051236 Largest integer a(n) for which the integer interval [ 0,a(n) ] is a subset of the set of determinants of all n X n 0-1 matrices. %C A051236 A definition for a(n) is given in Craigen's paper. The table given there suggests a(9)=102. Term for term, this sequence is one less than the sequence A013588. %D A051236 R. Craigen, The Range of the Determinant Function on the Set of n X n (0,1)-Matrices, J. Combin. Math. Combin. Computing, 8 (1990) pp. 161-171. %H A051236 G. R. Paseman, <a href="http://www.prado.com/~paseman/icm98sl.html">A Different Approach to Hadamard's Maximum Determinant Problem</a> %F A051236 a(n) = A013588(n) - 1 %e A051236 There is a 7x7 0-1 matrix with determinant 20, but no 7x7 0-1 matrix with determinant 19. %Y A051236 Cf. A013588. %K A051236 hard,nice,nonn %O A051236 1,3 %A A051236 Gerhard R. Paseman (paseman(AT)prado.com) %E A051236 Extended by William Orrick, Jan 12 2006