A272687 First differences of A078482.
1, 1, 4, 14, 50, 184, 694, 2670, 10440, 41374, 165830, 671084, 2738334, 11254362, 46547340, 193592830, 809165002, 3397135168, 14319385126, 60576862358, 257109077584, 1094541239294, 4672423779086, 19996407893908, 85778157486910, 368757697819570, 1588465839532628, 6855304750273902
Offset: 0
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Programs
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Mathematica
Differences[CoefficientList[Series[(1-3 x+x^2-Sqrt[1-6 x+7 x^2-2 x^3+x^4])/(2 x),{x,0,40}],x]] (* Harvey P. Dale, Jun 08 2024 *)