1249992

Appears in sequences

• Number of idempotent n X n 0..4 matrices of rank n-1.at n=7A224329
• Numbers in A245385 where P, Q, R, and S are all distinct.at n=34A245386
• a(n) = 972*n^2 - 270*n (n>=1).at n=35A305071
• Integers without 0 as a digit, with an odd number of digits, that are not repdigits, and such that the 2 products [d_1 d_2...dk]*[d_k+1 d_k+2...d_2k+1] and [d_1 d_2...d_k+1]*[d_k+2 d_k+2...d_2k+1] are equal.at n=10A385145