87388

Appears in sequences

• Number of distinct solutions to reverse the 8 puzzle (3 X 3 analog of the 4 X 4 15 puzzle) in 28, 30, 32, ... moves.at n=7A046164
• 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, -1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.at n=9A150194
• a(n) = (4^n + 20)/3.at n=9A156605
• Numerators of the second differences of the sequence of fractions (-1)^(n+1)*A176618(n)/A172031(n).at n=20A195240
• Sum over each antidiagonal of A244306.at n=27A244307
• First differences of A307632.at n=51A348773
• a(n) = A348773(2*n).at n=25A348775