91919

Appears in sequences

• [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 2 mod 3}.at n=24A024402
• Palindromes that start with 9.at n=41A043044
• Numbers whose consecutive digits differ by 8.at n=21A048410
• Palindromes that cannot be expressed as the difference of two palindromes.at n=12A083142
• a(n) = least k such that the remainder when 32^k is divided by k is n.at n=24A128372
• Number of compositions of n where each pair of adjacent parts is relatively prime.at n=19A167606
• a(n) is the least number not occurring earlier such that neighboring digits sum to 1 or 10.at n=23A182396
• Palindromic composite numbers starting with a digit 9.at n=37A222729
• Consider a decimal number of k>=2 digits x = d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + … + d_(2)*10 + d_(1) and the transform T(x)-> (d_(k)+d_(k-1) mod 10)*10^(k-1) + (d_(k-1)+d_(k-2) mod 10)*10^(k-2) + … + (d_(2)+d_(1) mod 10)*10 + (d_(1)+d(k) mod 10). Sequence lists the numbers x such that T(x)=0.at n=35A243994
• Numbers m with decimal expansion (d_k, ..., d_1) such that d_i = m ^ i mod 10 for i = 1..k.at n=45A344749
• Numbers m with decimal expansion (d_1, ..., d_k) such that d_i = m ^ i mod 10 for i = 1..k.at n=29A344823