965250

Appears in sequences

• Triangle read by rows: T(n,k) (n >= 2, k >= 0) is the number of non-crossing connected graphs on n nodes on a circle, having k interior faces. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....at n=40A089434
• a(n) = 1 + 471*n/140 + 1594*n^2/315 + 73*n^3/16 + 161*n^4/60 + 83*n^5/80 + 61*n^6/240 + n^7/28 + 11*n^8/5040.at n=10A271899