First sequence: 0, 1, 4, 9, 16, 🔎a, 36, ...
Second sequence: 2, 3, 5, 7, 11, 13, 17, 19, 🔎b, 🔎c, 🔎d, 37, ...
Third sequence: 130, 113, 96, 79, 🔎e, 45, …
Fourth sequence: 1, -3, 5, -7, 9, -11, 13, -15, 🔎f, -19, ...
Solution = (🔎a * (🔎c + 🔎e) - 🔎f + 2) / (🔎d - 🔎b + 2)