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 A308031 G.f. A(x) satisfies: A(x) = x + x^2 + x^3 + x^4 * (1 + A(A(x))). 2
 1, 1, 1, 1, 1, 2, 4, 8, 16, 34, 78, 195, 523, 1472, 4284, 12832, 39608, 126406, 418276, 1436230, 5110170, 18785417, 71109917, 276404921, 1101234823, 4493335194, 18773200580, 80320474041, 351906635253, 1578344960050, 7241981076424, 33961826526634, 162615016927284 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 COMMENTS Shifts left 4 places under COMPOSE transform. LINKS MATHEMATICA terms = 33; A[_] = 0; Do[A[x_] = x + x^2 + x^3 + x^4 (1 + A[A[x]]) + O[x]^(terms + 1) // Normal, terms + 1]; Rest[CoefficientList[A[x], x]] CROSSREFS Cf. A030266, A030277, A308030, A308032. Sequence in context: A248890 A308245 A209971 * A166354 A336009 A180207 Adjacent sequences: A308028 A308029 A308030 * A308032 A308033 A308034 KEYWORD nonn AUTHOR Ilya Gutkovskiy, May 10 2019 STATUS approved

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Last modified December 5 12:01 EST 2022. Contains 358586 sequences. (Running on oeis4.)