39999996

Appears in sequences

• Numbers n such that 2n+1 is the digit reversal of n+1.at n=6A083811
• a(n) = 4*(10^n - 1).at n=7A086575
• Triangle read by rows: T(n,k) = (n+1,k)-th element of (M^10-M)/9, where M is the infinite lower Pascal's triangle matrix, 1<=k<=n.at n=38A096044