References to A087800

a(n) =12a(n-1) - a(n-2), starting with a(0) = 2 and a(1) = 12, a(n) = (6+sqrt(35))^n + (6-sqrt(35))^n.
2, 12, 142, 1692, 20162, 240252, 2862862, 34114092, 406506242, 4843960812

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