746496

Appears in sequences

• Numbers of the form 4^i * 9^j, with i, j >= 0.at n=38A025620
• Squares expressible as the sum of two positive cubes in at least one way.at n=20A050802
• Denominators of the asymptotic expansion of the Airy function Ai(x).at n=3A060507
• Smallest positive integer for which the number of divisors is a product of 2 distinct primes: Min{x; d[x]=pq}.at n=21A061148
• Numbers that are the product of the squares of some subset of their digits.at n=10A061863
• Squares k which are divisible by phi(k).at n=32A063755
• For an integer k with prime factorization p_1*p_2*p_3* ... *p_m let k* = (p_1+1)*(p_2+1)*(p_3+1)* ... *(p_m+1) (A064478); sequence gives k such that k* is divisible by k.at n=27A064476
• For an integer n with prime factorization p_1*p_2*p_3* ... *p_m let n* = (p_1+1)*(p_2+1)*(p_3+1)* ... *(p_m+1); sequence gives n* such that n* is divisible by n, ordered by increasing value of n.at n=15A064518
• 16-almost primes (generalization of semiprimes).at n=22A069277
• 6-full numbers: if p divides n then so does p^6.at n=34A069493
• Numbers k such that Sum_i ( e(i)/p(i) ) is an integer, where the prime factorization of k is Product_i ( p(i)^e(i) ).at n=33A072873
• Sum of 2nd, 4th, 6th, 8th and 10th powers of divisors are divisible by sum of divisors.at n=22A074471
• Numbers k such that the sum of 2nd, 3rd, 4th and 5th powers of divisors of k are divisible by sum of divisors of k.at n=25A074632
• Expansion of 3*x*(1-x)*(1+2*x+6*x^2)/(1-24*x^3).at n=12A076509
• a(n) = 2^r*3^s where r = n(n+1)/2 and s = n(n-1)/2.at n=4A081955
• Coefficients of power series A(x) consist entirely of squares, where A(x) = A083352(x)^2 + A083352(x) - 1.at n=38A083353
• Least common multiple of first n 3-smooth numbers.at n=40A096075
• Smallest number having exactly s divisors, where s is the n-th semiprime (A001358).at n=25A096932
• Smallest number beginning with 7 and having exactly n prime divisors counted with multiplicity.at n=15A106427
• Expansion of -x^2*(2 + x - 2*x^2 - x^3 + 2*x^4) / ( (x-1)*(1+x)*(1 + x + x^2)*(x^2 - x + 1)*(x^2 + 4*x - 1)*(x^2 - x - 1) ).at n=11A115605