129540

Appears in sequences

• Numbers n such that sigma(n) = 12*phi(n).at n=14A104902
• 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), (0, 0, -1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.at n=9A150224
• a(n) = 144*n^2 - 2*n.at n=29A158135
• The 4-tuple (2, ((2*n+1)^2-1)/2, ((2*n+3)^2-1)/2, a(n)), where a(n) = 4*(3 + 20n + 42n^2 + 32n^3 + 8n^4), has Diophantus's property that the product of any two distinct terms plus one is a square.at n=6A160372
• Number of n X 4 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1s.at n=8A297220