263169

Appears in sequences

• Numbers that are the sum of 4 positive 9th powers.at n=17A003393
• Numbers n such that n divides 2^n + 1.at n=30A006521
• Numbers k such that k | 8^k + 1.at n=37A015955
• Pseudo-powers to base 3: numbers k that are not powers of 3 such that k divides 2^k + 1.at n=18A016057
• a(n) = (2^n + 1)^2.at n=9A028400
• n in base 8 is a palindromic square.at n=17A029806
• a(1) = 1; for n > 1, a(n) = smallest number > a(n-1) having exactly n divisors.at n=20A069654
• a(2n) = 2*4^n-1, a(2n+1) = (2^(n+1)+1)^2; interlaces A083420 with A028400.at n=17A107663
• Squares in A000695.at n=23A114399
• Numbers with 21 divisors.at n=25A137484
• Squares k such that k - 2 and k + 2 are prime.at n=14A144938
• Squares that become a prime number when prefixed with a 2.at n=22A167717
• Squares that become a prime number when prefixed with a 5.at n=13A167720
• Squares that become prime numbers when prefixed with an 8.at n=21A167723
• Maximum number of rational points on a smooth absolutely irreducible projective curve of genus 1 over the field F_2^n.at n=17A169872
• Call any positive integer that is a palindrome when written in binary a "binary palindrome". a(n) = the smallest product (the n-th binary palindrome)*(any binary palindrome) that is not a binary palindrome.at n=45A175241
• a(n) = 1 + sum{k=1 to n} A177268(k).at n=19A177269
• 1/4 the number of (n+1) X 2 binary arrays with all 2 X 2 subblock sums the same.at n=18A183978
• Numbers with prime factorization p^2*q^6.at n=25A189990
• The numbers n^2 as n runs through the numbers which are palindromes in base 2.at n=47A192775