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A334284 Denominators of power series coefficients of A(x) satisfying A(A(x)) = x + Sum_{k>=2} prime(k-1) * x^k. 1
1, 1, 2, 4, 8, 8, 16, 64, 128, 64, 256, 512, 1024, 2048, 2048, 16384, 32768, 16384, 65536, 131072, 262144, 262144, 524288, 2097152, 4194304, 2097152, 8388608, 8388608, 16777216, 134217728, 67108864, 1073741824, 2147483648, 1073741824, 4294967296 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..35.

Wikipedia, Functional square root

EXAMPLE

1, 1, 1/2, 3/4, -3/8, 11/8, -47/16, 291/64, -361/128, -327/64, 2651/256, 8117/512, -23761/1024, -920509/2048, ...

CROSSREFS

Cf. A008578, A030275, A030278, A334283 (numerators).

Sequence in context: A192097 A132720 A029930 * A193850 A140119 A273068

Adjacent sequences:  A334281 A334282 A334283 * A334285 A334286 A334287

KEYWORD

nonn,frac

AUTHOR

Ilya Gutkovskiy, Apr 21 2020

STATUS

approved

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Last modified August 7 19:52 EDT 2020. Contains 336279 sequences. (Running on oeis4.)