23637

Appears in sequences

• Number of partitions of n with equal number of parts congruent to each of 0 and 2 (mod 4).at n=49A035541
• Number of partitions satisfying cn(1,5) <= cn(0,5) + cn(2,5) and cn(1,5) <= cn(0,5) + cn(3,5) and cn(4,5) <= cn(0,5) + cn(2,5) and cn(4,5) <= cn(0,5) + cn(3,5).at n=44A039874
• Number of 2 X n checkerboards (with at least one red square) in which the set of red squares is edge connected.at n=10A059020
• Number of nX4 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=5A207914
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=41A207918
• Number of 6Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=3A207921
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 0 and 1 0 1 vertically.at n=41A208698
• Number of 6Xn 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 0 and 1 0 1 vertically.at n=3A208701
• Number of compositions c of n such that no three points (i,c_i), (j,c_j), (k,c_k) are collinear, where c_i denotes the i-th part.at n=22A238686
• Number of cycles in the grid graph P_11 X P_n.at n=1A358785
• G.f.: Sum_{k>=0} x^(k*(k+1)/2) * Product_{j=1..k} ((1 + x^j)/(1 - x^j))^2.at n=21A376853
• a(n) = round(Product_{k=1..n} (1 + 1/2^2^(-k))).at n=15A383471
• a(n) = round(Product_{k=1..n} 1 + 2^2^(-k)).at n=14A383472