80000000

Appears in sequences

• Powers of 2 written in base 16.at n=31A004655
• Triangle of coefficients in expansion of (1+10x)^n.at n=43A013617
• Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*1^j.at n=37A038303
• a(n) = n*10^(n-1).at n=7A053541
• Number of spanning trees in K_{n}-e, the complete graph on n nodes minus an edge (n > 1).at n=8A071720
• Largest n-digit multiple of n with digit sum n.at n=7A077758
• Powerful(1) numbers (A001694) whose digit reversal is a cube.at n=30A115693
• Coefficient of q^n in (1-q)^5/(1-5q); dimensions of the enveloping algebra of the derived free Lie algebra on 5 letters.at n=12A118266
• Numbers k such that k and k^2 use only the digits 0, 4, 5, 6 and 8.at n=14A136949
• a(n) = A138793(n+1)-A138793(n).at n=6A138794
• a(n) is the largest n-digit number whose sum of digits is n.at n=7A202270
• Triangle read by rows: minimum inversion terminator in rooted labeled trees.at n=37A217877
• Numerators of Postnikov's hook-length formula 2^n*(n+1)^(n-1)/n!.at n=9A241590
• 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=19A281067
• Numbers n such that Sum_{k>=1} digits(k)/k = 1 where digits() are the digits of n in base 10, the least significant digit having index 1.at n=23A291256
• Numbers k such that k^5 is sum of two positive 7th powers.at n=10A291831
• Triangle read by rows: T(0,0) = 1; T(n,k) = 10*T(n-1,k) + T(n-2,k-1) for k = 0..floor(n/2); T(n,k)=0 for n or k < 0.at n=26A317055
• Self-stuffable numbers (see the Comments section for definition).at n=20A322323
• Expansion of (1-2*x)/(1-10*x).at n=8A346178
• Numbers k such that sum of digits of k equals sum of digits of 1/k.at n=21A386682