33390

Appears in sequences

• a(n) = Sum_{k=1..(p-1)*(p-2)} floor((k*p)^(1/3)) where p is the n-th prime.at n=11A078838
• Ordered m for which m = k^3*a*b*(a^4 - b^4) determine (unique) solution triples(k,a,b), where k=1,2,3,... and (a,b) are coprime pairs, not both odd (i.e., of opposite parity).at n=24A081779
• Triangle read by rows: T(n,k) is the number of set partitions of the set {1,2,...,n} containing k blocks of size 2 (0 <= k <= floor(n/2)).at n=32A124498
• Coordination sequence for 6-dimensional cyclotomic lattice Z[zeta_18].at n=7A126900
• Numbers k such that 6*p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*p(k+5)-1 and 6*p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*p(k+5)+1 are twin primes with p(h) = h-th prime.at n=39A129311
• Triangle whose inverse has production matrix with general term (-1)^(n-k+1)*C(k+1, n-k+1).at n=50A172381
• Number of length 1+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=28A248538
• Number of (n+2) X (5+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 3.at n=25A255798
• Numbers of the form A000217(n)*A007494(n) that are divisible by 3.at n=29A295867
• Number of integer partitions of n such that every pair of distinct parts has a different product.at n=41A325856
• Number of partitions of [n] such that the minimal element of each block is also its size.at n=17A364207
• Primitive terms of A023197 that are of the form 4u+2.at n=24A388020
• Primitive terms of A388036.at n=37A388037