2094400

Appears in sequences

• One half of triple factorial numbers.at n=6A034000
• a(n) = (n+1)*a(n-3), a(0)=a(1)=a(2)=1 for n>1.at n=19A081406
• n-th partial product of A093839 divided by n.at n=8A093843
• An invertible triangle of ratios of triple factorials.at n=29A112333
• Triangle T(n, k, m) = t(n,m)/( t(k,m) * t(n-k,m) ) with T(n, 0, m) = T(n, n, m) = 1, where t(n, m) = Product_{j=1..n} Product_{i=1..j-1} ( 1 - (m+1)*(i+1) ) and m = 2, read by rows.at n=29A156691
• Triangle T(n, k, m) = t(n,m)/( t(k,m) * t(n-k,m) ) with T(n, 0, m) = T(n, n, m) = 1, where t(n, m) = Product_{j=1..n} Product_{i=1..j-1} ( 1 - (m+1)*(i+1) ) and m = 2, read by rows.at n=34A156691
• Triple factorials n!!!: a(n) = n*a(n-3).at n=20A161474
• a(n) is the least integer that can be expressed as the difference of two octagonal numbers in exactly n ways.at n=24A334037