63700992

Appears in sequences

• Dan numbers: numbers m of the form 2^j * 3^k such that m +- 1 are twin primes.at n=15A027856
• Duplicate of A027856.at n=15A059961
• Smallest k-almost prime between twin primes (for k >= 2).at n=21A068525
• Three people (P1, P2, P3) are in a circle and are saying Hello to each other. They start with P2 saying "Hello, Hello". Thereafter Pn says "Hello" for n times the total number of Hello's so far.at n=17A076507
• Expansion of 2*x*(1+4*x+8*x^2)/(1-24*x^3).at n=16A076508
• a(n) = the least number which is the average of two consecutive primes and has exactly n prime factors (counted with multiplicity).at n=21A092576
• Number of divisors of the n-th superior highly composite number.at n=34A098895
• Smallest number beginning with 6 and having exactly n prime divisors counted with multiplicity.at n=22A106426
• Numbers of divisors associated with the entries of A120585.at n=34A120586
• Numerators of (product of divisors of n / sum of divisors of n).at n=47A244668
• Number of length n+5 0..2 arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four.at n=17A249227
• a(n) = phi(n^6) = n^5*phi(n).at n=23A306411
• a(n) = denominator of Sum_{d|n} sigma(d)/pod(d) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).at n=47A324364
• a(n) = Product_{k=1..n-1} phi(gcd(n,k)).at n=41A349741
• 3-full numbers (A036966) sandwiched between twin primes.at n=17A360840
• 4-full numbers (A036967) sandwiched between twin primes.at n=4A360841
• 5-full numbers (A069492) sandwiched between twin primes.at n=2A360842