23952

Appears in sequences

• Number of configurations of the sliding block 8-puzzle that require a minimum of n moves to be reached, starting with the empty square in one of the corners.at n=22A089473
• Number of squares in the interior of the square with vertices (n,0), (0,n), (-n,0) and (0,-n) in a square (x,y)-grid.at n=32A111746
• 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, 1), (-1, 0, 0), (0, 0, 1), (1, -1, -1), (1, 1, -1)}.at n=10A148357
• Values of n such that n^a-+a are primes, a=5.at n=24A155021
• G.f. is the polynomial (1-x^3) * (1-x^6) * (1-x^9) * (1-x^12) * (1-x^15) * (1-x^18) / (1-x)^6.at n=27A162539
• G.f. is the polynomial (1-x^3) * (1-x^6) * (1-x^9) * (1-x^12) * (1-x^15) * (1-x^18) / (1-x)^6.at n=30A162539
• Numbers n such that n^2 is a sum of 2 and also of 4 consecutive primes.at n=23A252066
• Number of cyclic subgroups of the group GL(2, Z(n)), counting conjugates as distinct.at n=23A316560