987654321

Appears in sequences

• Concatenation of numbers from n down to 1.at n=8A000422
• Number of zeros in numbers 1 to 111...1 (n+1 digits).at n=8A014925
• Digits 1..n in strict descending order n..1 interpreted in base n+1.at n=8A051846
• n has distinct digits in descending order and n=a+b where a has the digits of n in another order and b has the digits of n in ascending order (perhaps with leading zeros).at n=3A055158
• n has digits in descending order and n=a+b where a has the digits of n in another order and b has the digits of n in ascending order (perhaps with leading zeros).at n=6A055161
• Add (n mod 10)*10^(n-1) to the previous term, with a(0) = 0.at n=9A057138
• Add (n mod 10)*10^(n-1) to the previous term, with a(0) = 0.at n=10A057138
• Smallest lucky number with a decimal expansion starting n, n-1, ..., 2, 1.at n=8A057610
• String together the first n numbers in an order which maximizes the result.at n=8A060554
• a(n) = (10^n - 1)*(80/81) + n/9.at n=8A064617
• a(n) is the shortest concatenation of two or more decreasing consecutive numbers (n)(n-1)...(0) such that n divides a(n), or n if there is no such concatenation.at n=8A069863
• Smallest multiple of n which begins with the reverse concatenation of first n natural numbers.at n=8A074159
• a(n) = A076803(n)/n.at n=9A077691
• Largest multiple of n that can be formed using the digits of first n natural numbers.at n=8A083431
• a(n) = (concatenation of numbers from n to 1) - n^n.at n=9A083453
• Smallest multiple of n which is the reverse concatenation of n consecutive numbers; or 0 if no such number exists.at n=8A083468
• Smallest multiple of n which is the concatenation of n successive numbers in descending order, or 0 if no such number exists.at n=8A087342
• Concatenation of digits of natural numbers from n down to 1.at n=8A104759
• 1 + 2*n + 3*n^2 + 4*n^3 + 5*n^4 + 6*n^5 + 7*n^6 + 8*n^7 + 9*n^8.at n=10A113630
• Factorial codes for the fixed points of the square of Vaillé's 1997 bijection on Dyck paths.at n=27A126299