37748736

Appears in sequences

• a(n) = 9*4^n.at n=11A002063
• a(n) = 9*2^n.at n=22A005010
• Number of compositions of n into 3*j-1 kinds of j's for all j >= 1.at n=13A055841
• a(n) = (n+1)*2^(n+4).at n=18A059165
• Smallest positive integer for which the number of divisors is a product of 2 distinct primes: Min{x; d[x]=pq}.at n=19A061148
• a(n) = gcd(Phi(n!), Phi(n^n), Phi(lcm(1..n))).at n=37A064449
• Reciprocal of n terminates with an infinite repetition of digit 4. Multiples of 10 are omitted.at n=5A064563
• Number of ways to tile Aztec diamond of order n with 2 squares removed with dominoes.at n=5A071097
• Expansion of g.f. (1 + 6*x + 5*x^2)/((1-2*x)*(1+2*x)).at n=24A084431
• Expansion of (1 - 2x + 2x^2 - x^3)/(1 - 2x)^2.at n=22A084860
• Number of divisors of n-th cyclic number.at n=25A087024
• Row 4 of array in A288580.at n=16A092398
• Smallest number having exactly s divisors, where s is the n-th semiprime (A001358).at n=23A096932
• Smallest number beginning with 3 and having exactly n prime divisors counted with multiplicity.at n=23A106423
• Third smallest number with exactly n prime factors.at n=23A116453
• Least number of the form semiprime - 1 which is the product of exactly n primes.at n=23A128686
• a(n) = (n^3 + n^2)*4^n.at n=7A129004
• a(n)=4a(n-2). Also 3*A084221.at n=23A137344
• Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 1 local maximum.at n=10A159721
• One quarter the number of nX2 1..4 arrays with no two neighbors of any element equal to each other.at n=11A183354