831402

Appears in sequences

• a(n) = (2n+3)!/(n!*(n+2)!).at n=8A000917
• Expansion of -1/x + 6*3F2( 5/6, 1, 7/6; 3/2, 2; 108*x).at n=4A028350
• Triangle read by rows: T(n,k) is the number of standard tableaux of shape (n,n,k) (0<=k<=n).at n=33A094236
• Ninth column (m=8) of (1,3)-Pascal triangle A095660.at n=15A095664
• Triangle T(n,k) = lcm(1,...,2*n+2)/((k+1)*binomial(2*k+2,k+1)).at n=48A120101
• Expansion of 3F2( (1/4,1/2,3/4); (4,6) )(256 x).at n=5A185247
• Number of valleys in all left factors of Dyck paths of length n. A valley is a (1,-1)-step followed by a (1,1)-step.at n=20A191522
• Number of turns in all left factors of Dyck paths of length n.at n=19A191527
• Expand the real root of y^3 - y + x in powers of x, then multiply coefficient of x^n by -4^n to get integers.at n=8A206300
• a(n) = (n!*m)/(m!*(m+1)!) where m = floor(n/2).at n=19A237884
• Expansion of (Sum_{k>=0} x^(k^4))^19.at n=24A282288
• Expansion of (Sum_{k>=0} x^(k^4))^19.at n=26A282288
• Number of Dyck paths of semilength n such that each positive level has exactly ten peaks.at n=29A288326
• Irregular triangle T giving the coefficients of x^n = x^{2*e2 + 3*e3} of (1 + x^2 + x^3)^n, with the pair of nonnegative numbers [e2, e3] listed in row n of A321201, for n >= 2.at n=38A321203
• Least k such that Sum_{i=1..n} k^i / i is a positive integer.at n=18A333072