A085363 - cp's OEIS frontend

A085363 a(0)=1, for n>0: a(n) = 49^(n-1) - (1/2)Sum_{i=1..n-1} a(i)*a(n-i).

n	a(n)
0	1
1	4
2	28
3	212
4	1676
5	13604
6	112380
7	940020
8	7936620
9	67494980
10	577309148
11	4961187092
12	42801458764
13	370478720356
14	3215827927228
15	27982214082612
16	244004165618220
17	2131710838837380
18	18654504783815580
19	163488269572628820

[1, 4, 28, 212, 1676, 13604, 112380, 940020, 7936620, 67494980, 577309148, 4961187092, 42801458764, 370478720356, 3215827927228, 27982214082612, 244004165618220, 2131710838837380, 18654504783815580, 163488269572628820]

cp's OEIS Frontend

A085363 a(0)=1, for n>0: a(n) = 49^(n-1) - (1/2)Sum_{i=1..n-1} a(i)*a(n-i).

Table of values

List of values

cp's OEIS Frontend

A085363 a(0)=1, for n>0: a(n) = 4*9^(n-1) - (1/2)*Sum_{i=1..n-1} a(i)*a(n-i).

Table of values

List of values

A085363 a(0)=1, for n>0: a(n) = 49^(n-1) - (1/2)Sum_{i=1..n-1} a(i)*a(n-i).