31404

Appears in sequences

• Number of lines through exactly 4 points of an n X n grid of points.at n=44A018811
• Molien series for Hecke group H_{3,4}.at n=23A027631
• a(n) = T(n,n) + T(n,n+1) + ... + T(n,2n), T given by A027960.at n=13A027973
• McKay-Thompson series of class 28B for the Monster group.at n=37A112169
• a(n) = (1/2)*A290904(n).at n=10A290905