A260902 - cp's OEIS frontend

A260902 a(n) = (-5(-1)^n + Sum_{k>=0} 2A000108(k)*k^n/5^k)/sqrt(5), where A000108 are Catalan numbers.

n	a(n)
0	-1
1	3
2	1
3	27
4	289
5	4683
6	95761
7	2382747
8	69870529
9	2359997163
10	90239163121
11	3853391348667
12	181765659243169
13	9386568200722443
14	526713953100688081
15	31912283163641549787
16	2076293242327577102209
17	144382074825232693748523
18	10686433228580787658046641

[-1, 3, 1, 27, 289, 4683, 95761, 2382747, 69870529, 2359997163, 90239163121, 3853391348667, 181765659243169, 9386568200722443, 526713953100688081, 31912283163641549787, 2076293242327577102209, 144382074825232693748523, 10686433228580787658046641]

cp's OEIS Frontend

A260902 a(n) = (-5(-1)^n + Sum_{k>=0} 2A000108(k)*k^n/5^k)/sqrt(5), where A000108 are Catalan numbers.

Table of values

List of values

cp's OEIS Frontend

A260902 a(n) = (-5*(-1)^n + Sum_{k>=0} 2*A000108(k)*k^n/5^k)/sqrt(5), where A000108 are Catalan numbers.

Table of values

List of values

A260902 a(n) = (-5(-1)^n + Sum_{k>=0} 2A000108(k)*k^n/5^k)/sqrt(5), where A000108 are Catalan numbers.