30900

Appears in sequences

• Number of "connected animals" formed from n 4-gon or 6-gon connected truncated octahedra in the b.c.c. lattice, allowing translation and rotations of the lattice and reflections.at n=6A038181
• a(n) is the decimal concatenation of n and n^2.at n=29A053061
• Antichains (or order ideals) in the poset 2*2*2*n or size of the distributive lattice J(2*2*2*n).at n=6A056932
• Antichains (or order ideals) in the poset 2*2*6*n or size of the distributive lattice J(2*2*6*n).at n=2A056933
• Integer floor of coefficients of exp(x*A(x)).at n=15A085022
• Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero.at n=11A189500
• Number of length n+2 0..5 arrays with some pair in every consecutive three terms totalling exactly 5.at n=5A245866
• T(n,k)=Number of length n+2 0..k arrays with some pair in every consecutive three terms totalling exactly k.at n=50A245869
• Number of length 6+2 0..n arrays with some pair in every consecutive three terms totalling exactly n.at n=4A245875
• Exponential (2,3)-perfect numbers: numbers m such that esigma(esigma(m)) = 3m, where esigma(m) is the sum of exponential divisors of m (A051377).at n=28A328132