53952

Appears in sequences

• a(n)*a(n+3) - a(n+1)*a(n+2) = 2^n, given a(0)=1, a(1)=1, a(2)=2.at n=15A080877
• a(n)*a(n+3) - a(n+1)*a(n+2) = 2^n, given a(0)=1, a(1)=1, a(2)=3.at n=14A080878
• Expansion of (1-3*x)/(1 - 6*x + 4*x^2).at n=7A098648
• 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, 0), (1, 1, -1), (1, 1, 0)}.at n=9A149377
• Number of (n+1)X8 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors.at n=13A205071
• Sum of the divisors of n^3+1.at n=34A234645
• Number of subsets of {1...n} containing no prime indices of the elements.at n=21A324741