Problem 45364. Sum of series

 a(n) = n^2 - (n-1)^2

   a(1)+a(2)+...+a(n)

Solution Comments

Problem Recent Solvers1307

Suggested Problems

• De-dupe

  3977 Solvers

• Is A the inverse of B?

  1434 Solvers

• Make a random, non-repeating vector.

  11816 Solvers

• Sum the numbers on the main diagonal

  620 Solvers

• 文字列の最初と最後の文字だけ抜き出しましょう。

  352 Solvers

More from this Author174

• Sub-sequence - 02

  24 Solvers

• generate nth pentatope number

  75 Solvers

• XOR fibonacci

  24 Solvers

• Yoonir - 01

  26 Solvers

• Dominant Matrix - 02

  10 Solvers