139264

Appears in sequences

• Number of paraffins.at n=30A006009
• a(n) = 2^(n-2)*(n^2 - n + 4).at n=12A053730
• Numbers k such that sigma(phi(k)) is a prime.at n=39A062514
• Volume (multiplied by 3) of polyhedron formed by points (i,j,k) in Z^3 with i^2+j^2+k^2 = n^2.at n=24A065089
• Numbers k such that usigma(phi(k)) is a prime.at n=27A065875
• 14-almost primes (generalization of semiprimes).at n=17A069275
• Numbers k such that phi(k) is a perfect 8th power.at n=16A078168
• a(n) = n*2^(n-4).at n=13A079859
• a(0) = a(1) = 1; for n > 1, a(n) = (n+2)*2^(n-2).at n=15A087447
• Number of subsets of {1,.., n} containing at least one twin prime pair.at n=17A089828
• E.g.f.: x/[1-tan(x)].at n=8A109572
• a(n) = 17*2^n.at n=13A110287
• First differences of A129952.at n=15A129953
• a(n) = 2^prime(n) + 2^prime(n+1).at n=5A137389
• Expansion of (1+8x^2+8x^3)/((1-2x)^2*(1+2x+4x^2)).at n=13A168057
• a(n) = n^7*(n^2 + 1)/2.at n=4A168636
• Triangle read by rows: Number of (2n+1)-step self-avoiding walks on diamond lattice ending at point with x = 2k+1.at n=34A227716
• Successive states of one-sided one-dimensional cellular automaton using Rule 90, starting with a single ON cell, converted to decimal.at n=17A245191
• Records values in A072994.at n=74A251642
• Number x such that x | A255242(x).at n=35A255243