748440

Appears in sequences

• Number of arrangements of 2n couples into n cars such that each car contains 2 men and 2 women but no couple (cars are labeled).at n=3A137801
• Denominators of the coefficients of the polynomials 1/Sum_{n>=1} x^(n-1)/((2*n)!/n!) = 2*exp(-x/4)*sqrt(x)/ (sqrt(Pi)*erf(sqrt(x)/2)).at n=5A154242
• A partition product of Stirling_2 type [parameter k = 1] with biggest-part statistic (triangle read by rows).at n=43A157401
• a(n) = 24*p(n) = 24*A000041(n).at n=39A183008
• Numbers m such that A186711(m) = 1.at n=19A186771
• Triangle read by rows. The coefficients of the Hahn polynomials in ascending order of powers. T(n, k) = n! * [x^k] hypergeom([-x, -n, n + 1], [1, 1], 1).at n=39A358624