53793

Appears in sequences

• a(n) = a(n-1)*2^n + 1 where a(0)=1.at n=5A073587
• a(n) = Sum_{k=0..floor(n/2)} 2^((n-2*k)*k) for n>=0.at n=11A117403
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.at n=8A150644
• a(n) = 32*n^2 + 1.at n=41A158575
• Duplicate of A073587.at n=5A182104
• a(n) = numerator of the fraction whose Engel expansion has the positive divisors of n as its terms.at n=31A220847
• Number of strictly non-overlapping holeless polyhexes of perimeter 2n, counted up to rotations and turning over.at n=17A258206
• a(n) = numerator of Sum_{d|n} (1/pod(d)) where pod(k) = the product of the divisors of k (A007955).at n=31A324501
• G.f. A(x) satisfies A(x) = 1 - x/A(x) * (1 - A(x) - A(x)^2).at n=21A371888