21627

Appears in sequences

• a(1) = 5; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=39A025005
• Numbers n such that n | 8^n + 7^n + 6^n + 5^n + 4^n + 3^n + 2^n + 1^n.at n=45A056751
• Numbers n such that n | 9^n + 8^n + 1.at n=19A057296
• Antidiagonal sums of triangle A092422, which is generated from the even-numbered Fibonacci polynomials (A011973).at n=18A092424
• Row sums of A154685.at n=26A151675
• Expansion of -(2*x*sqrt(1-8*x^2)-2*x) / (16*x^3+sqrt(1-8*x^2)*(4*x^2+2*x-1)-8*x^2-2*x+1).at n=11A243019
• Numbers x such that the sum of all their cyclic permutations is equal to that of all cyclic permutations of sigma(x) and all cyclic permutations of Euler totient function phi(x).at n=22A247317
• Terms of A046337 for which A358777 is zero, where the latter is the Dirichlet inverse of former's characteristic function.at n=32A359607