4311014400

Appears in sequences

• Number of pairs of sequences of cardinality at least 2.at n=12A052520
• A simple context-free grammar in a labeled universe: a(n) = A052743(n)-A052723(n), n>1.at n=11A052724
• Denominator of coefficient of x^(2n-1) in series of 3*sin(x)/(2+cos(x)).at n=7A115184
• Denominators of coefficients in expansion of 1/(2 + cos(sqrt(x))).at n=6A279233
• Triangle read by rows: T(n,k) (n>=1, 4<=k<=n+3) is the number of k-sequences of balls colored with at most n colors such that exactly three balls are of a color seen previously in the sequence.at n=43A292879
• a(0) = 0; for n>0, a(n) = 9*n!.at n=12A295473