197981

Appears in sequences

• Number of disconnected regular simple graphs on n vertices with girth at least 4.at n=25A185214
• Length of row n of the array in A274183.at n=30A274184
• Number of n X 2 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.at n=6A278303
• Number of nX7 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.at n=1A278308
• T(n,k)=Number of nXk 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.at n=29A278309
• T(n,k)=Number of nXk 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.at n=34A278309
• Expansion of Sum_{k>=0} x^(k^2) / Product_{j=1..k} (1 - x^j)^j.at n=49A318771