84720

Appears in sequences

• Intersection of A108027, A108028, A108029 and A108030.at n=34A108109
• a(n) = number |fdw(P,(n))| of entangled P-words with s=2.at n=4A211309
• Number of nX4 0..1 arrays with every element equal to 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.at n=13A298059
• Triangle T(n,k) read by rows: connected topologies of Goldstone diagrams with n interactions and k external potentials.at n=16A328923
• E.g.f. A(x) satisfies A(x) = exp( x^2*A(x)^2 ) * (1+x*A(x)).at n=6A387974
• Numbers k for which sigma(k) >= 2*k and (sigma(k) - 2*k) AND k = k, where AND is bitwise-and, A004198.at n=44A388026