7000000

Appears in sequences

• Triangle of coefficients in expansion of (1+10x)^n.at n=34A013617
• Triangle of coefficients in expansion of (4 + 5*x)^n.at n=42A013628
• Numbers of form 7^i*10^j, with i, j >= 0.at n=35A025632
• Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*1^j.at n=29A038303
• a(n) = n*10^(n-1).at n=6A053541
• Numbers n such that sum of the digits of n is >= the sum of the digits of n^4.at n=27A064210
• Turban numbers: without letters r, t, or u.at n=27A072956
• Largest n-digit multiple of n with digit sum n.at n=6A077758
• a(3n)=10^n. a(3n+1)=4*10^n. a(3n+2)=7*10^n.at n=20A135262
• Numbers k such that k and k^2 use only the digits 0, 3, 4, 7 and 9.at n=30A136934
• Numbers k such that k and k^2 use only the digits 0, 4, 5, 7 and 9.at n=31A136952
• Numbers k such that k and k^2 use only the digits 0, 4, 6, 7 and 9.at n=48A136955
• Numbers k such that k and k^2 use only the digits 0, 4, 7 and 9.at n=22A136960
• a(n) = A138793(n+1)-A138793(n).at n=5A138794
• a(n) = the smallest number ending in n-1 zeros divisible by n.at n=6A173478
• a(n) = the smallest n-digit number ending in n-1 zeros that is divisible by n, else 0.at n=6A173479
• a(n) = the largest n-digit number ending in n-1 zeros that is divisible by n, else 0.at n=6A173480
• a(n) = 1, 7, A011557*(period 6: repeat 10, 13, 31, 49, 70, 97).at n=36A178508
• Expansion of g.f. (1-3*x)/(1-10*x).at n=7A196662
• a(n) is the largest n-digit number whose sum of digits is n.at n=6A202270