4999999995

Appears in sequences

• a(n) = sum of all cyclic permutation of concatenation of first n numbers. In each case the digits of a number are kept together for n>9.at n=8A083956
• a(n) = 5*(10^n - 1).at n=9A086576
• Duplicate of A083956.at n=8A094760
• Sum of cyclic permutations of 123...n seen as number written in base n+1: ((n+1)^n-1)*(n+1)/2.at n=8A124797
• a(1)=1. For n>1, assume a(n-1) has decimal expansion qrstuvwxyz (with at most ten digits, where some of q, r, s, ... may be zero). Then a(n) = sum 99...9 (with z 9's) + 88...8 (with y 8's) + 77...7 (with x 7's) + ... For example, if a(n-1) were 243, we would sum 77 + 8888 + 999 and get 9964.at n=3A235400
• a(n) = n*(1 + n)*(10^n - 1)/18.at n=9A365645