106605

Appears in sequences

• Numbers k for which phi(k) + anti-phi(k) = k.at n=34A066418
• Constant term of the reduction of the n-th 2nd-kind Chebyshev polynomial by x^2 -> x+1.at n=11A192235
• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical or antidiagonal neighbor, and containing the value n(n+1)/2-2.at n=29A211924