514800

Appears in sequences

• a(n) = (2*n+n^2)*(binomial(2*n,n))/2.at n=8A119581
• Triangle read by rows: T(n,k) = binomial(n,k)*binomial(2*n-2*k,n-1), n>=1, 0<=k<=floor(n/2+1/2).at n=36A138767
• Sequence of coefficients of x^1 in marked mesh pattern generating function Q_{n,132}^(0,4,0,0)(x).at n=38A212347
• Triangle where the g.f. for row n equals d^n/dx^n (1+x+x^2)^n / n! for n>=0, as read by rows.at n=52A220178
• Number of elements of order n in the Tits group TF4(2)'.at n=3A284952
• The smallest number k for which exactly n of its divisors are digitally balanced numbers in base 3 (A049354).at n=16A372146
• Primitive terms of A023198: numbers k with the property sigma(k)/k >= 4 that are not divisible by any other number with that property.at n=37A392936