28891

Appears in sequences

• Products of 2 successive primes.at n=38A006094
• Numbers k such that 2*3^k + 35 is prime.at n=36A059768
• Consider a 3 X 3 X 3 Rubik cube, but only allow the moves M_R, D; sequence gives number of positions that are exactly n moves from the start.at n=12A080617
• a(n) = prime(2*n-1)*prime(2*n).at n=19A089581
• Table, read by antidiagonals, of iterated binomial transforms of A095148, which also forms the antidiagonal sums shift right.at n=61A095788
• Integer part of n#/(p-7)#, where p=preceding prime to n.at n=36A102792
• Product of the n-th sexy prime pair.at n=22A111192
• Numbers n such that exactly two positive d in the range d <= n/2 exist which divide binomial(n-d-1, d-1) and which are not coprime to n.at n=32A178098
• Product of adjacent primes with a gap of 6.at n=10A210477
• Number of (n+1) X (1+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.at n=9A251081
• Numbers that are both a sum and a product of two or more consecutive primes.at n=20A254859
• a(n) = (n+1)^3 - n^2.at n=30A261893
• Positions of records in A329040.at n=27A329051
• Centered pentagonal numbers which are squarefree semiprimes.at n=37A381043
• Centered pentagonal numbers which are semiprimes.at n=38A382132