151440

Appears in sequences

• Expansion of (1 + 4*x + 14*x^2 + 34*x^3 + 63*x^4 + 80*x^5 + 87*x^6 + 68*x^7 + 42*x^8 + 20*x^9 + 7*x^10) / ((1 - x)*(1 - x^2)^2*(1 - x^3)^2*(1 - x^4)).at n=21A055384
• Number of 4-step one or two space at a time rook's tours on an n X n board summed over all starting positions.at n=21A187289
• a(n,k) is the count of permutations with cycle length k in the products w*w over all permutations w of length n.at n=52A191718