|
| |
|
|
A143925
|
|
E.g.f. A(x) satisfies: A(x) = exp(x + x^2*A'(x)).
|
|
1
|
|
|
|
1, 1, 3, 25, 397, 10061, 369061, 18415825, 1197307161, 98248658905, 9928361978281, 1211474323983221, 175635827999270629, 29845580180227776277, 5876070628821158239293, 1327055145216772464211321
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,3
|
|
|
LINKS
|
|
|
|
FORMULA
|
a(n) ~ c * (n!)^2, where c = 0.80799863989712622039... - Vaclav Kotesovec, Feb 22 2014
|
|
|
PROG
|
(PARI) {a(n)=local(A=1+x); for(i=0, n, A=exp(x+x^2*deriv(A)+x*O(x^n))); n!*polcoeff(A, n)}
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
