289717

Properties

Appears in sequences

• Expansion of 1/((1-2x)(1-5x)(1-6x)).at n=6A016295
• Greatest number (in decimal representation) with n nonprime substrings in base-5 representation (substrings with leading zeros are considered to be nonprime).at n=15A217115
• Primes p such that p^6 - p^5 + 1 and p^6 - p^5 - 1 are both primes.at n=32A243522
• a(n) = a(n-1) + a(n-2) + 2*a(floor(n/2)) + 3*a(floor(n/3)) + ... + n*a(floor(n/n)), where a(0) = 1, a(1) = 1, a(2) = 1.at n=21A298369
• Prime numbersat n=25200