72882

Appears in sequences

• Number of permutations of length n that avoid the patterns 321, 1342, 4123.at n=18A116714
• a(n) = 225*n^2 - n.at n=17A156813
• a(n) = 900*n^2 - 2*n.at n=8A158408
• a(n) = 324*n^2 - 18.at n=14A158589