8100000000

Appears in sequences

• a(n) = (12*n)^4.at n=25A017524
• a(n) = 81*10^(n-2), a(0)=1, a(1)=8.at n=10A055996
• a(n) = binomial(n+2, 2)^4.at n=23A059977
• a(n) = (n-1)^2 * n^(n-2).at n=9A076728
• Total number of digits in all n-digit nonnegative integers.at n=8A113119
• a(n) = (A138793(n+1)-A138793(n))/10^n.at n=16A138795
• a(n) = 9*n*10^(n-1).at n=8A212704
• Number of (n+2)X(2+2) arrays of permutations of 0..n*4+7 with each element moved 0 or 1 knight moves and no more than 1 element left unmoved.at n=8A263566
• Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having index change +-(.,.) 0,0 1,2 or 2,-2.at n=4A264064
• Numbers k = p_i^e_i *...* p_r^e_r such that i/e_i +...+ r/e_r = 1 for e_i,..., e_r >= 1; p_i,..., p_r distinct prime numbers (A000040).at n=27A388006