318240

Appears in sequences

• a(n) = Product_{i=0..n-1} (8*i+2).at n=5A084948
• Octuple factorial, 8-factorial, n!8, n!!!!!!!!.at n=34A114800
• Triangle read by rows: t(n,m)=If[m == 0, 1, Product[m*k + 2, {k, 0, n}]].at n=40A153190
• Euler transform of Fibonacci numbers.at n=21A166861
• Triangle S(n,k) by rows: coefficients of 4^((n-1)/2)*(x^(1/4)*d/dx)^n when n is odd, and of 4^(n/2)*(x^(3/4)*d/dx)^n when n is even.at n=31A223170
• Triangle S(n,k) by rows: coefficients of 4^(n/2)*(x^(3/4)*d/dx)^n when n=0,2,4,6,...at n=17A223528
• a(n) is the denominator of Sum_{primes p < n} 1/(n-p).at n=36A305702
• a(n) is the least number k such that A349497(k) = n, or -1 if no such k exists.at n=36A349498
• a(n) = (2*n)!/(n!*a(n-1)), with a(0)=1.at n=9A372987
• Denominators of the partial alternating sums of the reciprocals of the sum of unitary divisors function (A034448).at n=29A379516