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A089209
Table, read by rows, related to Catalan triangle A033184.
0
1, 2, 1, 3, 2, 1, 2, 1, 4, 3, 2, 1, 3, 2, 1, 2, 1, 3, 2, 1, 2, 1, 5, 4, 3, 2, 1, 4, 3, 2, 1, 3, 2, 1, 2, 1, 4, 3, 2, 1, 3, 2, 1, 2, 1, 3, 2, 1, 2, 1, 4, 3, 2, 1, 3, 2, 1, 2, 1, 3, 2, 1, 2, 1, 6, 5, 4, 3, 2, 1, 5, 4, 3, 2, 1, 4, 3, 2, 1, 3, 2, 1, 2, 1, 5, 4, 3, 2, 1, 4, 3, 2, 1, 3, 2, 1, 2, 1, 4, 3, 2, 1, 3, 2, 1
OFFSET
1,2
COMMENTS
A033184(n,k) is the number of occurrences of k in the n-th row . There are A000108(n) numbers in the n-th row.
FORMULA
Let 1->21; 2->321; 3->4321; 4->54321; 5->654321; .... the table is defined by : row 1 :1; row 1->row 2 :2, 1; row 2->row 3 :3, 2, 1, 2, 1; row 3->row 4 :4, 3, 2, 1, 3, 2, 1, 2, 1, 3, 2, 1, 2, 1; ...row n->row n+1.
CROSSREFS
KEYWORD
easy,nonn,tabl
AUTHOR
Philippe Deléham, Dec 21 2003
STATUS
approved