31989

Appears in sequences

• Concatenating n with n+1 (in base 10) gives a number which is the product of 2 palindromes.at n=19A113942
• Number of (n+2)X(5+2) 0..1 arrays x(i,j) with every row sum{j*x(i,j), j=1..5+2} equal, and every column sum{i*x(i,j), i=1..n+2} equal, with upper left element zero.at n=8A232651
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays x(i,j) with every row sum{j*x(i,j), j=1..k+2} equal, and every column sum{i*x(i,j), i=1..n+2} equal, with upper left element zero.at n=82A232654
• The growth series for the affine Coxeter (or Weyl) group [3,3,5] (or H_4).at n=43A266783
• Expansion of Product_{1 <= i < j} 1/(1 - x^(i*j)).at n=42A321285