2504902400

Appears in sequences

• Triple factorial numbers a(n) = n!!!, defined by a(n) = n*a(n-3), a(0) = a(1) = 1, a(2) = 2. Sometimes written n!3.at n=26A007661
• Triple factorial numbers: Product_{k=0..n-1} (3*k+2).at n=9A008544
• An invertible triangle of ratios of triple factorials.at n=45A112333
• Lower triangular array called S2hat(-2) related to partition number array A144274.at n=45A144275
• Triangle read by rows. A generalization of unsigned Lah numbers, called L[3,1].at n=45A290596