摘要:
Lattice pathsProblem_15Starting in the top left corner of a 2×2 grid,and only being able to move to the right and down,there are exactly 6 routes to t... 阅读全文
摘要:
Coded triangle numbersProblem 42The nth term of the sequence of triangle numbers is given by,tn=1/2n(n+1);so the first ten triangle numbers are: 1, 3,... 阅读全文