38400

Appears in sequences

• Bisection of A002470.at n=21A002287
• Coefficients of series arising in solution of Riccati equation y' = y^2 + x^2.at n=2A008563
• Expansion of (theta_3(q) / theta_4(q) )^4 in powers of q; also of 1 / (1 - lambda(z)).at n=6A014972
• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RSN = RUB-17 K4Na12[Zn8Si28O72].18H2O starting with a T3 atom.at n=14A019221
• Numbers that, when expressed in base 4 and then interpreted in base 10, yield a multiple of the original number.at n=43A032540
• Numbers k such that A102489(k) is divisible by k.at n=40A032563
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*10^j.at n=12A038288
• Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*8^j.at n=12A038310
• a(n) = Sum_{d|n, n/d=1 mod 4} d^4 - Sum_{d|n, n/d=3 mod 4} d^4.at n=13A050468
• Composite n added to sum of its prime factors is nextprime(n).at n=0A050765
• First occurrence from iterated procedure 'composite k added to sum of its prime factors reaches a prime' yielding n skipped primes.at n=0A050777
• a(n) is the cototient of n^3.at n=39A053192
• 12-almost primes (generalization of semiprimes).at n=19A069273
• Aliquot sequence starting at 1521.at n=9A074906
• Numbers k such that Omega(k) = Omega(k-1) + Omega(k-2) + Omega(k-3) + Omega(k-4) where Omega(k) denotes the number of prime factors of k, counting multiplicity.at n=32A078095
• Number of pairs of polynomials (f,g) in GF(3)[x] satisfying 1 <= deg(f) < =n, 1 <= deg(g) <= n and gcd(f,g) = 1.at n=4A087292
• Array used for numerators of g.f.s for column sequences of array A090214 ((4,4)-Stirling2).at n=5A090221
• Expansion of phi(q^4) / phi(q) in powers of q where phi() is a Ramanujan theta function.at n=24A112128
• Expansion of (theta_4(q) / theta_3(q))^4 in powers of q.at n=6A128692
• Expansion of (phi(q^2) / phi(-q))^2 in powers of q where phi() is a Ramanujan theta function.at n=12A131126