Write the first 5 terms of the sequences defined by
`T_n = n(n-1)`

Write the first three terms of the sequence defined by the following : a_n =n(n+2) .

What is the 20th term of the sequence defined by : a_n = (n- 1) (2-n)(3+n) ?

Find the 18th and 25th terms of the sequence defined by : t_n= {(n(n+2),if n is even natural number),((4n)/(n^2+1), if n is odd natural number):} .

Write the first three terms in the sequences defined by the following : a_n =2n + 5 .

Write the first three terms in the sequences defined by the following : a_n =(n-3)/4 .

Find the 21st and 42nd terms of the sequence defined by : t_n= {(0,if n is odd),(1, if n is even):} .

Write the first five terms of the sequences given below whose nth terms are: a_n = (-1)^(n-1) 5^(n+1)

Write the first five terms of the sequences given below whose nth terms are: a_n = n /(n+ 1)

Write the first five terms of the sequences given below whose nth terms are: a_n = n (n+ 2)

Write the first five terms of the sequences given below whose nth terms are: a_n = n(n^2+5)/4