61953

Appears in sequences

• a(1)=2, a(2)=2, a(n)=a(n-2)+floor(a(n-2)*a(n-1)/(a(n-2)+a(n-1))).at n=49A173091
• Number of nX6 0..2 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=2A224308
• T(n,k)=Number of nXk 0..2 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=30A224310
• Number of 3Xn 0..2 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=5A224311
• a(n) is the smallest m such that A347191(m) = 2*n, where A347191(m) = tau(m^2 - 1).at n=32A347193
• Expansion of (1/x) * Series_Reversion( x / (1/(1-x) + x^2) ).at n=10A369618
• Expansion of g.f. A(x) satisfying 0 = Sum_{k=0..n} (-1)^k * binomial(2*n, 2*k) * ([x^k] A(x)^n) for n >= 1.at n=5A375440