19000000

Appears in sequences

• Numbers n such that sum of the digits of n is >= the sum of the digits of n^4.at n=30A064210
• Square array read by antidiagonals. Convolution of a(n) = 2*a(n-1) - a(n-2) and 10^n.at n=37A178643
• Number of 0..n arrays x(0..6) of 7 elements with each no smaller than the sum of its previous elements modulo (n+1).at n=17A200256
• Number of 3 X 3 0..n arrays with every element equal to a diagonal or antidiagonal reflection.at n=8A209594
• a(1) = 1; a(n) is the smallest natural number such that a(n) > a(n-1), and the name of a(n) in English starts with the letter a(n-1) ends with, and a(n) makes the sequence extendable.at n=17A281067