210900

Appears in sequences

• a(n) = Product_{k>=0} (1 + floor(n/2^k)).at n=36A132269
• a(0)=1, a(n) = (3n-1)*3n*(3n+1)/2 for n>0.at n=25A157024
• Number of nX2 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in increasing order.at n=37A166814
• a(n) = 2n*(n+1)*(2n+1).at n=37A300758