638976

Appears in sequences

• Theta series of D*_13 lattice.at n=29A022066
• Expansion of (theta_3(z^4)^3 + theta_2(z^4)^3)^4.at n=29A028697
• A hierarchical sequence (S(W'2{3}*c) - see A059126).at n=12A059162
• 16-almost primes (generalization of semiprimes).at n=21A069277
• a(n) = 2^n*binomial(n,2).at n=13A100381
• Expansion of (phi(x) / f(-x^4))^4 in powers of x where phi(), f() are Ramanujan theta functions.at n=39A227175
• Consider the Post tag system defined in A284116; a(n) = number of binary words of length n which terminate at the empty word.at n=20A289670
• Number of 4-cycles in the n-Sierpinski tetrahedron graph.at n=8A292542
• a(n) is the number of subsets of {1,2,...,n} that contain exactly two odd numbers.at n=25A330592
• Total number of ones in runs of 1's of length >= 4 over all binary strings of length n.at n=18A386250