553410

Appears in sequences

• Triangle T(n,k) = P(n,k)/2, n >= 2, 1 <= k < n, of one-half of number of permutations of 1..n such that the differences have k runs with the same signs.at n=41A008970
• a(n) = Sum_{k=1..prime(n)-1} floor(k^3/prime(n)).at n=31A078837
• Numbers k such that 1*k + 1, 3*k + 1, 9*k + 1, 27*k + 1, 81*k + 1 are all primes.at n=25A112042
• Record values in A034058.at n=30A389568