A133309 - cp's OEIS frontend

A133309 a(n) = (1/n)Sum_{i=0..n-1} C(n,i)C(n,i+1)8^i9^(n-i), a(0)=1.

n	a(n)
0	1
1	9
2	153
3	3249
4	77265
5	1968633
6	52546473
7	1450365921
8	41058670113
9	1185580310121
10	34783088255289
11	1033907690362257
12	31070005849929969
13	942384250116160857
14	28812102048874578249
15	887007207177728561601
16	27473495809057571051073
17	855518113376312857290441

[1, 9, 153, 3249, 77265, 1968633, 52546473, 1450365921, 41058670113, 1185580310121, 34783088255289, 1033907690362257, 31070005849929969, 942384250116160857, 28812102048874578249, 887007207177728561601, 27473495809057571051073, 855518113376312857290441]

cp's OEIS Frontend

A133309 a(n) = (1/n)Sum_{i=0..n-1} C(n,i)C(n,i+1)8^i9^(n-i), a(0)=1.

Table of values

List of values

cp's OEIS Frontend

A133309 a(n) = (1/n)*Sum_{i=0..n-1} C(n,i)*C(n,i+1)*8^i*9^(n-i), a(0)=1.

Table of values

List of values

A133309 a(n) = (1/n)Sum_{i=0..n-1} C(n,i)C(n,i+1)8^i9^(n-i), a(0)=1.