33280

Appears in sequences

• Droll numbers: numbers > 1 whose sum of even prime factors equals the sum of odd prime factors.at n=11A019507
• a(n) = Product_{i=1..n} (3^i - 1).at n=4A027871
• Sorted k-factorial numbers (numbers of form k-1 excluded).at n=38A028687
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 91.at n=34A031589
• Sums of distinct powers of 8.at n=40A033045
• Positive numbers having the same set of digits in base 2 and base 8.at n=35A037413
• Sums of 2 distinct powers of 8.at n=13A038484
• Numbers having four 0's in base 8.at n=28A043424
• Golden rectangular box numbers: a(n) = n*A007067(n)*A007067(A007067(n)).at n=20A050510
• Sums of two powers of 8.at n=18A055259
• Number of squares in an n X n grid of squares with diagonals.at n=31A111500
• Triangle read by rows: T(n,k) is the number of hill-free Dyck paths of semilength n, having k ascents of length at least 2 (1 <= k <= floor(n/2), n >= 2).at n=37A114593
• Expansion of 1/(1-x-3*x^2-4*x^3-2*x^4).at n=11A124861
• a(n) = 4a(n-1) - 6a(n-2) + 4a(n-3), n > 3; a(0) = 3, a(1) = 2, a(2) = a(3) = 0.at n=15A133209
• G.f. satisfies: A(x) = x + A(A(A(A(x))))^2.at n=5A141383
• Positive integers n such that n^2 = (x^4 - y^4)*(z^4 - t^4) where the pairs of integers (x,y) and (z,t) are not proportional.at n=27A147854
• a(n) = n^5 + n^3.at n=8A155977
• a(n) = n^5*(n^3 + 1)/2.at n=4A168371
• a(n) = n^10*(n^6 + 1)/2.at n=2A170798
• Triangle T(n, k, q) = c(n, q)/(c(k, q)*c(n-k, q)) where c(n,q) = Product_{j=1..n} (q^j -1)^(n-j) and q = 3, read by rows.at n=16A173504