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a[1]:=1; a[2]:=1; a[n_]:=a[n] = a[n-1]+2 Sum[a[k] a[n-k], {k, 2, n-1}]; Map[a, Range[24]] (* _Oliver Seipel_, Nov 03 2024, after Schröder 1870 *)
Map[a, Range[24]] (* Oliver Seipel, Nov 03 2024, after Schröder 1870 *)
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editing
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Map[a, Range[24]] (* Oliver Seipel, Nov 03 2024, after Schröder 1870 *)
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editing
editing
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a[1]:=1; a[2]:=1; a[n_]:=a[n] = a[n-1]+2 Sum[a[k] a[n-k], {k, 2, n-1}];
Map[a, Range[24]] (* Oliver Seipel, Nov 03 2024, after Schröder 1870*)
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reviewed
approved
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reviewed
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