30266

Appears in sequences

• Coordination sequence for root lattice B_3.at n=39A022145
• Numbers n such that 8*10^n + 2*R_n + 1 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=21A103075
• a(1) = 1+2-3 = 0, a(2) = 4+5+6-7 = 8, a(3) = 8+9+10+11-12 = 26, a(4) = 13+14+15+16+17-18 = 57, ...at n=37A111694
• Number of strictly increasing arrangements of 5 nonzero numbers in -(n+3)..(n+3) with sum zero.at n=23A188124
• Least integer k such that k/2^n > e^2.at n=12A293360
• The integer k that minimizes |k/2^n - e^2|.at n=12A293361