31043

Appears in sequences

• Sums of two or more distinct 4th powers of primes.at n=35A130833
• Partial sums of A001037, the number of degree-n irreducible polynomials over GF(2).at n=18A173270
• Composite numbers k such that sigma(k + sigma(k)) = 2*sigma(k).at n=30A246858
• a(n) = b(n) - Sum_{j=0..n-1} b(j) with b(n) = binomial(2*n, n).at n=9A281593
• p-INVERT of (1,2,1,3,1,4,1,5,...) (A133622), where p(S) = 1 - S - S^2.at n=9A289809
• Positions of powerful terms among the numbers satisfying Euler's condition for odd perfect numbers (A228058).at n=10A388279