1062880

Appears in sequences

• Largest term in periodic part of continued fraction expansion of square root of -1+3^n.at n=23A077627
• a(n) = 2*(3^n - 1).at n=12A100774
• Number of palindromes (in base 3) below 3^n.at n=24A117862
• Number of palindromes (in base 9) below 9^n.at n=11A117868
• Partial sums of A162436.at n=23A164123
• Number of genus 7, degree n, simply ramified covers of an elliptic curve.at n=1A170996
• Spironacci-style recurrence: a(0)=0, a(1)=1, a(n) = 2*a(n) XOR a(A265409(n)).at n=21A265407
• Numbers n for which A324108(n) = A324054(n-1) and which are neither prime powers nor of the form 2^i * p^j, where p is an odd prime, with either exponent i or j > 0.at n=37A324111
• a(n)/n! is the maximum absolute value of the entries of the inverse of the Vandermonde matrix with entries 0,1,2,..., n-1.at n=7A335786
• Semi-one numbers: Positive integers k such that exactly half of the integers 1..k have a 1 in their decimal expansion.at n=15A343839
• a(n) is the smallest positive integer k such that for all x >= k, at least 50% of the integers in the range 1..x contain n in their decimal expansion. In other words, it is the largest integer k such that exactly half of the integers 1..k have n in their decimal expansion.at n=1A346685
• Numbers that are palindromes in both ternary and balanced ternary representations with representations that are different.at n=31A354886