55000000

Appears in sequences

• Average of positive multiples of 3 with n decimal digits, rounded down.at n=7A110431
• a(n) = n^7*(n + 1)/2.at n=10A168635
• 1-parking triangle T(r, i, 1) read by rows: T(r, i, k) = (r + 1)^(i-1)*binomial(k*(r + 1) + r - i - 1, r - i) with k = 1 and 0 <= i <= r.at n=52A329057