Find the 18th and 25th terms of the sequence defined by

Write the first three terms of the following sequences whose n^th terms are given by

(i) (ii) c_n = (–1)ⁿ3ⁿ⁺² (iii)

Find the indicated terms in each of the sequences whose n^th terms are given by

(i) (ii) a_n = (-1)ⁿ 2^{n + 3} (n + 1); a₅, a₈

(iii) a_n = 2n² – 3n + 1; a₅, a₇ (iv) a_n = (-1)ⁿ (1 – n + n²); a₅, a₈

Find the 13th and 16th terms of the sequence defined by

Find the first five terms of the sequence given by a₁ = 2, a₂ = 3 + a₁and a_n = 2a_n-1 + 5 for n>2.