The nth hexagonal number is given by the formula:
hn = 2n * (2n - 1) / 2
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Formula for nth termTn = a + (4n - 1) {where a is the first term and n is natural number}
The nth triangular number is 0.5*n*(n+1)
The Nth term formula for oblong numbers is N = N(N+1)
Fn = Fn-1 + Fn-2 And F0 = F1 = 1
Give the simple formula for the nth term of the following arithmetic sequence. Your answer will be of the form an + b.12, 16, 20, 24, 28, ...