121365

Appears in sequences

• a(n) = b(n) - c(n) where b(n) is the n-th Fibonacci number greater than 2 and c(n) is the n-th number not in sequence b( ).at n=22A014251
• a(n) = (9/2)*(n-1)*(n-2)*(n-3).at n=31A134171
• Numbers k such that (6*k+1)*(12*k+1)*(18*k+1) is a Carmichael number which is the product of four prime numbers.at n=31A221743
• The Wiener index of the Kneser graph K(n,2) (n>=5).at n=26A228306
• Number of ways to place 2 points on a triangular grid of side n so that they are not adjacent.at n=29A239568