21983

Appears in sequences

• Numbers k such that x^k + x^5 + 1 is irreducible over GF(2).at n=29A057474
• Number of kites, distinct up to congruence, on an n X n grid (or geoboard).at n=39A181946
• Number of ballot sequences of length n with exactly 7 fixed points.at n=16A239118
• Numbers n such that x^(n-5)*(x+1)^5+1 is irreducible in F2[x].at n=22A267918
• Numbers of the form prime(w)*prime(x)*prime(y) with w >= x >= y such that 2w = 3x + 4y.at n=30A358102