55573

Appears in sequences

• a(n) = a(n-1)+a(m), where m=2n-2-2^(p+1) and 2^p<n-1<=2^(p+1), for n >= 4.at n=35A050071
• 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, 0), (-1, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.at n=10A148623
• Number of acute triangles, distinct up to congruence, on an n X n grid (or geoboard).at n=31A190021
• Indices of records in A091719 (greatest common divisors of consecutive partition numbers).at n=11A334728
• a(n) = smallest k such that li(k) - pi(k) >= n, where li(k) is the logarithmic integral and pi(x) is the number of primes <= x.at n=41A359145