20414

Appears in sequences

• a(0) = 1, a(n) = 28*n^2 + 2 for n>0.at n=27A010018
• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFI = ZSM-5 Nan[AlnSi96-nO192] starting with a T12 atom.at n=13A019167
• Expansion of 1/((1-7x)(1-10x)(1-11x)(1-12x)).at n=3A028228
• Iterates of A122227, starting from A122227(4)=17.at n=7A122231
• Number of different lattices formed by intersections of two composition series of length n.at n=8A217944
• Smallest even k such that lpf(k-1) = prime(n), while lpf(k-3) > prime(n), where lpf=least prime factor (A020639).at n=31A242489
• Least even k such that sfdf(k-3) > sfdf(k-1) >= A050376(n), where sfdf(n) is the smallest Fermi-Dirac factor of n (A223490).at n=37A244343
• Least even k such that sfdf(k-3) > sfdf(k-1) >= A050376(n), where sfdf(n) is the smallest Fermi-Dirac factor of n (A223490).at n=38A244343
• Number of (6+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=8A258559
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood.at n=25A273540
• Expansion of (A(x)^2+A(x^2))/2 where A(x) = A001006(x)-1.at n=12A275209
• G.f. A(x) satisfies 1/2 = Sum_{n=-oo..+oo} x^n*A(x)^n * (A(x)^n + x)^(2*n-1) * (x^n + A(x))^(2*n-1).at n=4A381362