A224514 - cp's OEIS frontend

A224514 Expansion of (1-x)(1-3x)(1-3x+x^2)/(1-9x+28x^2-35x^3+15x^4-x^5).

n	a(n)
0	1
1	2
2	6
3	20
4	70
5	251
6	911
7	3327
8	12190
9	44744
10	164407
11	604487
12	2223504
13	8181175
14	30108147
15	110820165
16	407946421
17	1501844193
18	5529362694
19	20358557249
20	74961030414
21	276017648570
22	1016360893036
23	3742540945813
24	13781324308298
25	50748099850042

[1, 2, 6, 20, 70, 251, 911, 3327, 12190, 44744, 164407, 604487, 2223504, 8181175, 30108147, 110820165, 407946421, 1501844193, 5529362694, 20358557249, 74961030414, 276017648570, 1016360893036, 3742540945813, 13781324308298, 50748099850042]

cp's OEIS Frontend

A224514 Expansion of (1-x)(1-3x)(1-3x+x^2)/(1-9x+28x^2-35x^3+15x^4-x^5).

Table of values

List of values

cp's OEIS Frontend

A224514 Expansion of (1-x)*(1-3*x)*(1-3*x+x^2)/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).

Table of values

List of values

A224514 Expansion of (1-x)(1-3x)(1-3x+x^2)/(1-9x+28x^2-35x^3+15x^4-x^5).