0000:00:00:00:00Start19Number 19ExplanationGiven ana_nan is the n-th term of a sequence of numbers. If an=an+1+3an+3a_n = a_{n+1} + 3a_{n+3}an=an+1+3an+3, a1=−1a_1 = -1a1=−1, and a2=2a_2 = 2a2=2, then the value of a4+a1a_4 + a_1a4+a1 is−2-2−2−1-1−1000111222
19Number 19ExplanationGiven ana_nan is the n-th term of a sequence of numbers. If an=an+1+3an+3a_n = a_{n+1} + 3a_{n+3}an=an+1+3an+3, a1=−1a_1 = -1a1=−1, and a2=2a_2 = 2a2=2, then the value of a4+a1a_4 + a_1a4+a1 is−2-2−2−1-1−1000111222
