A015884 - cp's OEIS frontend

A015884 A modified Pierce-type expansion for Pi: Pi = a(0) + Sum_{n>=1} (-1)^floor(n/2)/(Product_{i=1..n} a(i)).

n	a(n)
0	3
1	7
2	113
3	4739
4	46804
5	134370
6	614063
7	1669512
8	15474115
9	18858140
10	19180902
11	41486462
12	492988666
13	1794101482
14	34644610027
15	48670872793
16	97414216753
17	138669015304
18	195575194804
19	543142431219
20	3173502039447
21	4968328076747

[3, 7, 113, 4739, 46804, 134370, 614063, 1669512, 15474115, 18858140, 19180902, 41486462, 492988666, 1794101482, 34644610027, 48670872793, 97414216753, 138669015304, 195575194804, 543142431219, 3173502039447, 4968328076747]

cp's OEIS Frontend

A015884 A modified Pierce-type expansion for Pi: Pi = a(0) + Sum_{n>=1} (-1)^floor(n/2)/(Product_{i=1..n} a(i)).

Table of values

List of values