312114

Appears in sequences

• Number of projective order types.at n=10A018242
• a(n) = n-th elementary symmetric function of the first n+1 positive integers congruent to 1 mod 4.at n=5A024382
• Triangle read by rows: T(n, k) is the Sheffer triangle ((1 - 4*x)^(-1/4), (-1/4)*log(1 - 4*x)). A generalized Stirling1 triangle.at n=22A290319
• Numbers whose k digits can be permuted into a new k-digit number according to rules explained in the Comments section.at n=21A330418