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A223533 Coefficients of (x^(1/3)*d/dx)^n for positive integer n. 3

%I #25 Jun 24 2017 01:13:44

%S 1,1,3,-1,9,9,1,-1,18,9,-5,5,15,90,27,35,-35,225,405,81,-105,105,-35,

%T 630,567,81,1155,-1155,490,-105,4158,2268,243,15015,-15015,6895,945,

%U -10206,-23814,-8748,-729,75075,-75075,35700,-10675,2835,-945,34020,41310,10935,729

%N Coefficients of (x^(1/3)*d/dx)^n for positive integer n.

%C These are generalized Stirling numbers.

%H U. N. Katugampola, <a href="http://authors.elsevier.com/a/1QhUNLvMg0Zs~">Mellin Transforms of Generalized Fractional Integrals and Derivatives</a>, Appl. Math. Comput. 257(2015) 566-580.

%F G.f.: exp(((1+2/3*x*y)^(3/2)-1)/x).

%e 1;

%e 1, 3;

%e -1, 9, 9;

%e 1, -1, 18, 9;

%e -5, 5, 15, 90, 27;

%e 35, -35, 225, 405, 81;

%e -105, 105, 630, 567, -35, 81;

%e 1155, -1155, 630, 4158, 490, 2268, -105, 243;

%p # This will generate the sequence as coefficients of pseudo polynomials

%p # up to a constant multiple.

%p a[0] := f(x):

%p for i to 10 do

%p a[i] := simplify(x^(1/3)*(diff(a[i-1],x$1)))

%p end do;

%Y Cf. A223168-A223172, A223534-A223536.

%K sign,tabl

%O 1,3

%A _Udita Katugampola_, Apr 18 2013

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)