Find the first five terms of the sequence in which a1 = 6 and an = –3an – 1 – 12, if n ≥ 2.

a. 30, 78, –246, 726, –2190

b. 6, –30, 78, –246, 726

c. 6, 6, –30, 78, –246

d. –15, –18, –21, –24, –27