A185621 Column 1 of triangular matrix T = A185620, which satisfies: T^3 - T^2 + I = SHIFT_LEFT(T).
1, 1, 3, 10, 42, 226, 1525, 12555, 123098, 1408656, 18499835, 274937571, 4569703790, 84104161618, 1699644180677, 37442806230267, 893577983768401, 22976420374082264, 633487846228307145, 18649221873212499505
Offset: 0