174019

Properties

Appears in sequences

• Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 2 which is symmetric after a rotation by 180 degrees.at n=10A123763
• Primes p such that A008472(p-1) = A008472(p+1), where A008472 = sum of distinct primes dividing n.at n=12A203182
• Primes of the form n^3 - T(n) - 1 where T(n) is the n-th triangular number.at n=13A229960
• Partition the sequence A073682 into groups so that the sum of each group is prime, then a(n) is the sum of terms in n-th group.at n=10A253664
• Prime numbersat n=15836