A230740 - cp's OEIS frontend

A230740 O.g.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k(k+1)/2 + x) / (1 + k(k+1)/2*x).

n	a(n)
0	1
1	1
2	3
3	10
4	51
5	370
6	3691
7	48525
8	812089
9	16832928
10	422860609
11	12649706416
12	444120983433
13	18078156682309
14	844323149201499
15	44838127594166770
16	2686250544297734323
17	180295858504407010026
18	13473490672899749784979
19	1114874245392058455432873

[1, 1, 3, 10, 51, 370, 3691, 48525, 812089, 16832928, 422860609, 12649706416, 444120983433, 18078156682309, 844323149201499, 44838127594166770, 2686250544297734323, 180295858504407010026, 13473490672899749784979, 1114874245392058455432873]

cp's OEIS Frontend

A230740 O.g.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k(k+1)/2 + x) / (1 + k(k+1)/2*x).

Table of values

List of values

cp's OEIS Frontend

A230740 O.g.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k*(k+1)/2 + x) / (1 + k*(k+1)/2*x).

Table of values

List of values

A230740 O.g.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k(k+1)/2 + x) / (1 + k(k+1)/2*x).