43009

Appears in sequences

• Composite and every divisor (except 1) contains the digit 4.at n=27A062670
• a(n) = 42*n^2 + 1.at n=32A158604
• Generalized Markoff numbers: largest number a in a 5-tuple a >= b >= c >= d >= e satisfying the Markoff(5) equation a^2 + b^2 + c^2 + d^2 + e^2 = 4*a*b*c*d*e.at n=17A229241
• a(n) = 2*a(n-1) + 2^(n+1) - 1, a(0) = 0.at n=11A392083