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Revision History for A001003

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Showing entries 1-10 | older changes
Schroeder's second problem (generalized parentheses); also called super-Catalan numbers or little Schroeder numbers.
(history; published version)
#711 by Michael De Vlieger at Sun Nov 03 12:27:25 EST 2024
STATUS

proposed

approved

#710 by Michael De Vlieger at Sun Nov 03 12:27:15 EST 2024
STATUS

editing

proposed

#709 by Michael De Vlieger at Sun Nov 03 12:27:10 EST 2024
MATHEMATICA

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 *)

STATUS

proposed

editing

#708 by Michel Marcus at Sun Nov 03 08:18:39 EST 2024
STATUS

editing

proposed

#707 by Michel Marcus at Sun Nov 03 08:18:34 EST 2024
MATHEMATICA

Map[a, Range[24]] (* Oliver Seipel, Nov 03 2024, after Schröder 1870 *)

STATUS

proposed

editing

#706 by Oliver Seipel at Sun Nov 03 07:18:12 EST 2024
STATUS

editing

proposed

#705 by Oliver Seipel at Sun Nov 03 07:16:59 EST 2024
MATHEMATICA

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*)

STATUS

approved

editing

#704 by Peter Luschny at Mon Oct 28 04:54:32 EDT 2024
STATUS

reviewed

approved

#703 by Joerg Arndt at Mon Oct 28 02:06:10 EDT 2024
STATUS

proposed

reviewed

#702 by G. C. Greubel at Mon Oct 28 01:24:29 EDT 2024
STATUS

editing

proposed