100 REM Catalan numbers
110 DIM C(15)
120 C(0) = 1
130 PRINT 0, C(0)
140 FOR N = 0 TO 14
150  C(N + 1) = 0
160  FOR I = 0 TO N
170   C(N + 1) = C(N + 1) + C(I) * C(N - I)
180  NEXT I
190  PRINT N + 1, C(N + 1)
200 NEXT N
210 END