19162

Appears in sequences

• a(n) = (d(n)-r(n))/2, where d = A026043 and r is the periodic sequence with fundamental period (1,1,0,0).at n=45A026044
• a(n) = A051193(A072109(n))/A018804(A072109(n)).at n=5A071645
• Triangle formed by left half of A101842, read by rows.at n=38A101845
• a(n) = permanent of an n X n matrix M of zeros and ones defined as follows: if we concatenate the rows of M to form a vector v of length n^2, v_i = 0 if i is prime and v_i = 1, otherwise.at n=6A110950
• A000145(n) / 8 - (n^5 + 1).at n=20A188671
• Number of (n+1) X 6 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively.at n=10A204648
• Expansion of Product_{k>=1} 1/(1 - A000009(k)*x^k).at n=20A270995
• a(n) = 75*2^n - 38.at n=8A304612
• The number of regions in the G-Shi arrangement when G is the cycle graph C_n.at n=8A355645
• Triangle read by rows: T(n, k) is the number of parking functions of length n with preferences restricted to {1, ..., k} for 0 <= k <= n.at n=48A373086