280064

Appears in sequences

• Numbers that are the sum of 2 positive 7th powers.at n=16A003369
• Numbers that are the sum of at most 2 positive 7th powers.at n=23A004864
• a(n) = 2^n + 6^n.at n=7A074601
• Numbers that can be represented as a^7 + b^7, with 0 < a < b, in exactly one way.at n=11A088719
• Expansion of (1-6*x+4*x^2)/((1-2*x)*(1-6*x)).at n=8A092807
• a(n) = Sum_{0<d|n, n/d odd} d^7.at n=5A096961
• Sum of 7th powers of digits of n.at n=26A123253
• Shifts left when Dirichlet convolution (DC:(b,b)->a) applied 3 times.at n=7A144317
• Square array A(n,k), n>=1, k>=1, read by antidiagonals, with A(1,k)=1 and sequence a_k of column k shifts left when Dirichlet convolution (DC:(b,b)->a) applied k times.at n=52A144324
• Sum of the 7th powers of the divisor complements of the odd proper divisors of n.at n=5A352053
• Numbers which are the sum or difference of two seventh powers.at n=38A364654