149520

Appears in sequences

• Numbers k such that (k-1, k+1) and (k/2-1, k/2+1) are both pairs of twin primes.at n=23A076504
• Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.at n=2A151593
• Triangle read by rows: T(n,k) = t(n,k) + t(n,n-k), where t(n,k) = 2*(n!/k!)*(2*(n + k) - 1).at n=39A154987
• Triangle read by rows: T(n,k) = t(n,k) + t(n,n-k), where t(n,k) = 2*(n!/k!)*(2*(n + k) - 1).at n=41A154987
• Number of length n+4 0..2 arrays with no five consecutive terms having the maximum of any two terms equal to the minimum of the remaining three terms.at n=12A249838
• a(n) = prime(n+1)^4 - prime(n)^4.at n=7A276963
• Number of inequivalent leaf-colorings of rooted identity trees with n nodes.at n=13A318227