243100

Appears in sequences

• a(n) = (n+1)*binomial(n+8, 8).at n=9A056003
• Number of conics which pass through 3 points and are bitangent to a general curve of order n.at n=26A060783
• Consider all compositions (ordered partitions) of n into n parts, allowing zeros. E.g., for n = 3 we get 300, 030, 003, 210, 120, 201, 102, 021, 012, 111. Then a(n) is the total number of 1's.at n=9A097070
• Exponential transform of C(n,8) = A000581.at n=17A145458
• Row sums of the extended Catalan triangle A189231.at n=17A189911
• Number of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)=1.at n=35A212894
• Number of (n+5)X8 0..2 matrices with each 6X6 subblock idempotent.at n=6A224631
• Number of (n+5)X12 0..2 matrices with each 6X6 subblock idempotent.at n=2A224635
• Number of length-5 0..n arrays with no repeated value differing from the previous repeated value by one or less.at n=10A269608
• a(n) = (2+[n/2])*n!/((1+[n/2])*[n/2]!^2).at n=17A275329