18683

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite HEU = Heulandite Ca4[Al8Si28O72].24H2O starting with a T2 atom.at n=13A019137
• Numbers ending with '3' that are the difference of two positive cubes.at n=36A038858
• Numbers n such that 30n-13, 30n-11, 30n-1, 30n+1, 30n+11, 30n+13 are all prime.at n=12A175683
• Monotonic ordering of nonnegative differences 3^i-10^j, for 40>= i>=0, j>=0.at n=22A192159
• a(n) = Fibonacci(p) mod p^2, where p = prime(n).at n=39A236395
• Numbers k such that (229*10^k - 1)/3 is prime.at n=21A280272
• Numbers n such that 3n appears earlier than 2n in A280864.at n=41A280755