1627920

Appears in sequences

• a(n) = LCM of the n consecutive numbers n(n-1)/2 + 1, ..., n(n+1)/2.at n=5A061431
• Denominator of sum of first n terms of the series 1/3 + 1/8 + 1/24 ... in which the denominators are one less than a perfect square that cannot otherwise be written as a power (cf. A062757, A037450).at n=12A062834
• Denominator of sum of first n terms of the series 1/3 + 1/8 + 1/24 ... in which the denominators are one less than a perfect square that cannot otherwise be written as a power (cf. A062757, A037450).at n=13A062834
• Denominator of Sum_{i=n(n-1)/2+1..n(n+1)/2} 1/i.at n=5A082681
• Triangle T(n, k) = (2*n+1)!! * 2^(floor((n-1)/2) + floor(k/2) + 1) * Beta(floor(n/2) + floor((k-1)/2) + 2, floor((n-1)/2) + floor(k/2) + 2), read by rows.at n=40A158868
• Triangle T(n, k) = ((n-k)/6)*binomial(n-1, k-1)*binomial(2*n, 2*k) with T(n, 0) = T(n, n) = 1, read by rows.at n=58A174119
• Triangle T(n, k) = ((n-k)/6)*binomial(n-1, k-1)*binomial(2*n, 2*k) with T(n, 0) = T(n, n) = 1, read by rows.at n=62A174119
• Denominator of Sum_{i = Fibonacci(n-1)+1..Fibonacci(n)} 1/i.at n=7A218873
• a(n) = 21*binomial(n+6,7).at n=14A266733
• Numbers between a pair of consecutive highly abundant numbers (A002093) having the same sum of divisors as the lesser one.at n=5A308574
• Numbers that occur exactly 5 times in A036038, i.e., numbers m such that the multinomial coefficient (x_1 + ... + x_k)!/(x_1! * ... * x_k!) is equal to m for exactly 5 integer partitions (x_1, ..., x_k).at n=9A376375