321989

Appears in sequences

• Pisot sequence E(14,23), a(n) = floor( a(n-1)^2/a(n-2)+1/2 ).at n=20A010902
• Triangle read by rows: coefficient of x^n in the power series of x/(1 - m*x - x^2 + x^3 - x^5) in row n, column m=1..n+2.at n=50A117744
• Numbers whose arithmetic derivative (A003415) is a primorial number (A002110) > 1.at n=39A327978