A271898 - cp's OEIS frontend

A271898 Expansion of ( 1+x^2 ) / ( 1-4x+5x^2-4*x^3 ).

n	a(n)
0	1
1	4
2	12
3	32
4	84
5	224
6	604
7	1632
8	4404
9	11872
10	31996
11	86240
12	232468
13	626656
14	1689244
15	4553568
16	12274676
17	33087840
18	89192252
19	240428512
20	648104148
21	1747043040
22	4709365468
23	12694663264
24	34219997876
25	92244137056
26	248655211900
27	670280153824
28	1806821104020
29	4870504494560
30	13129033073436

[1, 4, 12, 32, 84, 224, 604, 1632, 4404, 11872, 31996, 86240, 232468, 626656, 1689244, 4553568, 12274676, 33087840, 89192252, 240428512, 648104148, 1747043040, 4709365468, 12694663264, 34219997876, 92244137056, 248655211900, 670280153824, 1806821104020, 4870504494560, 13129033073436]

cp's OEIS Frontend

A271898 Expansion of ( 1+x^2 ) / ( 1-4x+5x^2-4*x^3 ).

Table of values

List of values

cp's OEIS Frontend

A271898 Expansion of ( 1+x^2 ) / ( 1-4*x+5*x^2-4*x^3 ).

Table of values

List of values

A271898 Expansion of ( 1+x^2 ) / ( 1-4x+5x^2-4*x^3 ).