9000000001

Appears in sequences

• Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero.at n=26A058421
• a(n) = n*10^n + 1.at n=9A064748
• Smallest prime in which the n-th significant digit is a 9.at n=9A069593
• Largest n-digit prime with digit sum n, or 0 if no such prime exists.at n=9A073865
• First n-digit number that occurs in the sequence A085951.at n=9A085952
• Happy primes of the form a*10^k + b with single-digit a and b, a > 0, k > 0.at n=34A109902
• The n-digit prime with the largest number of zero decimal digits, the largest of these if there are more than one. Zero if no such prime exists.at n=9A177998
• Generalized Cullen primes: any primes that can be written in the form n*b^n + 1 with n+2 > b > 2.at n=4A210339
• Primes of the form k*10^k + 1.at n=2A216347
• 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=27A281067