1071000

Appears in sequences

• Number of irreducible words of length 2n in the free group with generators x,y such that the total degree of x and the total degree of y both equal zero.at n=8A007987
• Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 7.at n=13A136839
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 7.at n=31A136856
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 6 and 7.at n=27A136860
• Numbers k such that k and k^2 use only the digits 0, 1, 4 and 7.at n=11A136863
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 7 and 8.at n=32A136864
• Triangular array read by rows: T(n,k) is the number of partial order relations on [n] that have exactly k components, n>=0, 0<=k<=n.at n=50A352399