28872

Appears in sequences

• Starting positions of strings of three 4's in the decimal expansion of Pi.at n=22A083615
• Triangle read by rows: T(n,0)=1, T(n,n)=(2*n-1)!!+1, T(n,k) = 2*(n-k) * T(n-1,k-1) + 2*(k+1)*T(n-1,k).at n=25A099755
• Small-number statistic from the enumeration of domino tilings of a 7-pillow of order n.at n=17A112841
• Total sum of squares of number of distinct parts in all partitions of n.at n=24A135348
• G.f. A(x) satisfies: A(x - A(x)^2) = x + A(-x)^2.at n=6A277034
• Numbers m > 0 that have a divisor d > 1 with binomial(m+d, d) == 1 mod m.at n=48A290040
• Coefficients in q-expansion of E_2^3 * E_4^2, where E_2 and E_4 are respectively the Eisenstein series A006352 and A004009.at n=2A386813