69905

Appears in sequences

• sigma_4(n): sum of 4th powers of divisors of n.at n=15A001159
• Numerator of sum of -4th powers of divisors of n.at n=15A017671
• a(n) = 1^n + 2^n + 4^n + 8^n + 16^n.at n=4A020514
• Triangle of Gaussian binomial coefficients [ n,k ] for q = 16.at n=16A022180
• Triangle of Gaussian binomial coefficients [ n,k ] for q = 16.at n=19A022180
• a(n) is least k such that k and 8k are anagrams in base n (written in base 10).at n=23A023100
• Numbers k such that k^2 is palindromic in base 16.at n=30A029733
• Numbers whose set of base-16 digits is {1,4}.at n=30A032828
• Numbers whose set of base-16 digits is {1,3}.at n=30A032923
• Numbers whose set of base-16 digits is {1,2}.at n=30A032936
• a(1) = 1, a(2n) = 16a(n), a(2n+1) = a(2n)+1.at n=31A033052
• Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,0.at n=8A033114
• Numbers whose base-4 representation has exactly 9 runs.at n=0A043600
• Numbers n such that number of runs in the base 4 representation of n is congruent to 1 mod 8.at n=24A043851
• Numbers n such that number of runs in the base 4 representation of n is congruent to 0 mod 9.at n=0A043858
• Numbers k such that number of runs in the base 4 representation of k is congruent to 9 mod 10.at n=0A043876
• a(n) = n^4 + n^3 + n^2 + n + 1.at n=16A053699
• a(n) = n^8 + n^6 + n^4 + n^2 + 1.at n=4A059839
• a(n) = sigma_n(n^2): sum of n-th powers of divisors of n^2.at n=3A062755
• Numbers of the form (4^{mr}-1)/(4^r-1) for positive integers m, r.at n=19A076275