A338727 - cp's OEIS frontend

A338727 a(n) = C(n+1)^2 - 2C(n+1)C(n) + C(n)^2, where C() is a Catalan number.

n	a(n)
0	1
1	1
2	9
3	81
4	784
5	8100
6	88209
7	1002001
8	11778624
9	142420356
10	1763160100
11	22268399076
12	286105172544
13	3730846771600
14	49286086364025
15	658580586980625
16	8890060997894400
17	121099761397088100
18	1663131325207760100
19	23009839285003272900
20	320486852887891560000
21	4491184012659823424400
22	63291012091734041000100

[1, 1, 9, 81, 784, 8100, 88209, 1002001, 11778624, 142420356, 1763160100, 22268399076, 286105172544, 3730846771600, 49286086364025, 658580586980625, 8890060997894400, 121099761397088100, 1663131325207760100, 23009839285003272900, 320486852887891560000, 4491184012659823424400, 63291012091734041000100]

cp's OEIS Frontend

A338727 a(n) = C(n+1)^2 - 2C(n+1)C(n) + C(n)^2, where C() is a Catalan number.

Table of values

List of values

cp's OEIS Frontend

A338727 a(n) = C(n+1)^2 - 2*C(n+1)*C(n) + C(n)^2, where C() is a Catalan number.

Table of values

List of values

A338727 a(n) = C(n+1)^2 - 2C(n+1)C(n) + C(n)^2, where C() is a Catalan number.