193967

Appears in sequences

• 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, -1, 0), (-1, 1, 0), (0, 0, -1), (0, 0, 1), (1, 0, 0)}.at n=10A150054
• a(n) is the least positive integer k such that 10^(k/A386725(k)) has at least n correct decimal digits of Pi.at n=9A385570