A223511-A223522 oddities

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Brendan

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Feb 20, 2026, 8:57:45 PMFeb 20

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In A223511-A223522, there is a consistent missing ) for the simplify function.

For example b[j]:=simplify(x^14*diff(b[j-1], x$1);

should be b[j]:=simplify(x^14*diff(b[j-1], x$1));

That corrects the syntax, but the code doesn't do anything useful for me.

For example A223516 makes output like this (converted to 1-D):

x^14*diff(f(x),x)
x^27*(diff(diff(f(x),x),x)*x+14*diff(f(x),x))
x^40*(diff(diff(diff(f(x),x),x),x)*x^2+42*diff(diff(f(x),x),x)*x+378*diff(f(x),x))
...