28003

Appears in sequences

• Square array of numbers T(n,k) = ((1+sqrt(3))*(k+sqrt(3))^n-(1-sqrt(3))*(k-sqrt(3))^n)/(2*sqrt(3)), read by antidiagonals.at n=61A086404
• Generalized Pell numbers P(n,5,5).at n=12A141448
• 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, -1, 0), (-1, 1, 0), (1, -1, 1), (1, 0, 0)}.at n=11A148180
• a(n) = ((3+sqrt(3))*(4+sqrt(3))^n+(3-sqrt(3))*(4-sqrt(3))^n)/6.at n=6A162557
• G.f.: [Sum_{n>=0} x^(n*(n+1)/2) * (1+x)^n ]^3.at n=39A182152
• Number of integer partitions of n whose parts do not have choosable sets of strict integer partitions.at n=39A387137