53664

Appears in sequences

• [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 4}.at n=18A024389
• Determinant of power series of gamma matrix with determinant 2!.at n=5A158040
• Numbers k such that 39*10^k + 1 is prime.at n=23A282280
• a(n) = (1/2) * Sum_{k=0..floor(n/3)} 2^(n-2*k) * binomial(2*n-4*k+2,2*k+1).at n=9A387602
• Square array A(n,k) = A388979(A388981(n, k)), read by descending antidiagonals.at n=12A389169