A217779 - cp's OEIS frontend

A217779 Expansion of (1-4x+4x^2)/((1-5x+5x^2)*(1-3x+x^2)).

n	a(n)
0	1
1	4
2	15
3	56
4	208
5	768
6	2821
7	10320
8	37639
9	136972
10	497652
11	1805984
12	6548425
13	23729916
14	85953823
15	311240928
16	1126753336
17	4078394080
18	14760382029
19	53415642632
20	193291233367
21	699417041844
22	2530731376540
23	9156839587776
24	33131242464913
25	119873850697588

[1, 4, 15, 56, 208, 768, 2821, 10320, 37639, 136972, 497652, 1805984, 6548425, 23729916, 85953823, 311240928, 1126753336, 4078394080, 14760382029, 53415642632, 193291233367, 699417041844, 2530731376540, 9156839587776, 33131242464913, 119873850697588]

cp's OEIS Frontend

A217779 Expansion of (1-4x+4x^2)/((1-5x+5x^2)*(1-3x+x^2)).

Table of values

List of values

cp's OEIS Frontend

A217779 Expansion of (1-4x+4*x^2)/((1-5x+5*x^2)*(1-3x+x^2)).

Table of values

List of values

A217779 Expansion of (1-4x+4x^2)/((1-5x+5x^2)*(1-3x+x^2)).