Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges in which the leftmost leaf is at level k.
1, 1, 2, 3, 5, 4, 12, 19, 16, 8, 55, 85, 73, 44, 16, 273, 416, 361, 234, 112, 32, 1428
3 seqfan posts
Sun Jan 25 19:09:52 CET 2009 [seqfan] Re: A101428 compared to A101409, polyminoes and trees
Sun Jan 25 19:09:52 CET 2009 [seqfan] Re: A101428 compared to A101409, polyminoes and trees
Sun Jan 25 18:09:40 CET 2009 [seqfan] A101428 compared to A101409, polyminoes and trees
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
Links to OEIS content are included according to
The OEIS End-User License Agreement
.