20000001

Appears in sequences

• Numbers k such that k^2+k+2 is a palindrome.at n=34A027712
• Numbers k such that k^2 contains only digits {0,1,4}, not ending with zero.at n=26A058413
• a(n) = sqrt(A077204(n)).at n=14A077205
• a(1) = 2, then the smallest squarefree number greater than the previous term that begins with the end of the previous term.at n=19A077209
• a(1) = 1 and a(n+1) is the least number > a(n) that begins with the last digit of a(n) and doesn't end with 0.at n=21A098752
• a(n) = 2*10^n + 1.at n=7A199682
• Concatenate the positions of digits 0, 1,..., 9 in the decimal representation of n, using 1 for the rightmost digit etc., and 0 when the digit does not occur.at n=29A260519
• Triprimes with sum of digits 3.at n=17A383971