21962

Appears in sequences

• Numbers k such that 15*2^k - 1 is prime.at n=32A002237
• The array of A059578 read by antidiagonals in the 'up' direction.at n=34A059579
• a(n) is the least x such that the cyclotomic polynomial values Phi(d,x) are prime for all d dividing n.at n=38A072942
• (3*11^n+1)/2.at n=4A199751
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2>x^2+y^2.at n=44A211637
• Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than ten.at n=12A292216
• a(n) is the smallest positive integer of length (distance from origin) n in the Cayley graph of the integers generated by all powers of 11.at n=21A297181