It is T/2 * (t+1)
Chat with our AI personalities
The nth triangular number is 0.5*n*(n+1)
t(n) = n*(n+1)/2
The Nth term formula for oblong numbers is N = N(N+1)
1, 3, 6, 10, 15 ,21 The nth term for the sequence (where you replace n with the term you want to find) is: (n(n+1))/2
The nth term is 0.37n+0.5 and the 10th term is 4.2