A260701 - cp's OEIS frontend

A260701 a(n) = (-3(-1)^n + Sum_{k>=0} A000108(k)k^n/6^k)/sqrt(3), where A000108 are Catalan numbers.

n	a(n)
0	-1
1	2
2	-1
3	5
4	20
5	197
6	2219
7	30620
8	496565
9	9265037
10	195535514
11	4605925535
12	119796721835
13	3410051954402
14	105449267146859
15	3520120318516625
16	126168879827914580
17	4832661370036811417
18	197001989531658791879
19	8515772839409988885140
20	389080859811496699020425

[-1, 2, -1, 5, 20, 197, 2219, 30620, 496565, 9265037, 195535514, 4605925535, 119796721835, 3410051954402, 105449267146859, 3520120318516625, 126168879827914580, 4832661370036811417, 197001989531658791879, 8515772839409988885140, 389080859811496699020425]

cp's OEIS Frontend

A260701 a(n) = (-3(-1)^n + Sum_{k>=0} A000108(k)k^n/6^k)/sqrt(3), where A000108 are Catalan numbers.

Table of values

List of values

cp's OEIS Frontend

A260701 a(n) = (-3*(-1)^n + Sum_{k>=0} A000108(k)*k^n/6^k)/sqrt(3), where A000108 are Catalan numbers.

Table of values

List of values

A260701 a(n) = (-3(-1)^n + Sum_{k>=0} A000108(k)k^n/6^k)/sqrt(3), where A000108 are Catalan numbers.