Hello,
Here's a nice pile of
$J_n(z)$ zeroes: https://pastebin.com/raw/vepKVF8s
For reference, here's the code that generated it:
With[{count = 100, ord = 99, digits = 6},
Export["bz.dat",
Table[NumberForm[N[BesselJZero[n, k]], digits], {k, count}, {n, 0, ord}], "Table",
Alignment -> Left, "FieldSeparators" -> " ",
TableHeadings -> {Range[count], Table[J[n, x], {n, 0, ord}]}]]
Adjust the parameters in the first part of With[]
for a bigger table or more digits.
FWIW, you could try generating smaller-scale versions of the table from the free Wolfram Development Platform. Go here, and after it finishes loading, try
With[{count = 50, ord = 20, digits = 8},
TableForm[Table[NumberForm[N[BesselJZero[n, k]], digits], {k, count}, {n, 0, ord}],
TableAlignments -> {Left, Center}, TableHeadings -> {Range[count], Table[J[n, x], {n, 0, ord}]}]]