39400

Appears in sequences

• Let N(k) and D(k) be the sequences defined in A054765 and A012244; write N(k)* D(k+j ) - N(k+j)*D(k) = (-1)^(k+1)*(k!)^2*P(k) where P(k) is a polynomial in k of degree j-1; sequence gives coefficients of expansion of P(k) in powers of k for j=1,2,3,...at n=37A054798
• Least m such that both p|m and p+2|m+2 for twin prime pairs (p,p+2) (p=A001359).at n=14A097972
• Number of irregular primes less than or equal to the 10^n-th prime.at n=4A105468
• a(n) = n^4 + 5*n^2 + 4.at n=14A156798
• a(n) = n*(n + 1)*(17*n - 14)/6.at n=24A237617
• Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=9A317233
• Number of labeled n-vertex 2-edge multigraphs that are neither crossing nor nesting.at n=25A326247
• Numbers k such that k and k+1 are both divisible by the total binary weight of their divisors (A093653).at n=15A338514
• Number of ways of placing A352241(n) nonattacking black-square queens on an n X n board.at n=18A352325