A021006 - cp's OEIS frontend

A021006 Pisot sequence P(4,11), a(0)=4, a(1)=11, a(n+1) is the nearest integer to a(n)^2/a(n-1). Evidently satisfies a(n) = 2a(n-1)+2a(n-2).

n	a(n)
0	4
1	11
2	30
3	82
4	224
5	612
6	1672
7	4568
8	12480
9	34096
10	93152
11	254496
12	695296
13	1899584
14	5189760
15	14178688
16	38736896
17	105831168
18	289136128
19	789934592
20	2158141440
21	5896152064
22	16108587008
23	44009478144
24	120236130304
25	328491216896
26	897454694400
27	2451891822592
28	6698693033984
29	18301169713152
30	49999725494272
31	136601790414848

[4, 11, 30, 82, 224, 612, 1672, 4568, 12480, 34096, 93152, 254496, 695296, 1899584, 5189760, 14178688, 38736896, 105831168, 289136128, 789934592, 2158141440, 5896152064, 16108587008, 44009478144, 120236130304, 328491216896, 897454694400, 2451891822592, 6698693033984, 18301169713152, 49999725494272, 136601790414848]

cp's OEIS Frontend

A021006 Pisot sequence P(4,11), a(0)=4, a(1)=11, a(n+1) is the nearest integer to a(n)^2/a(n-1). Evidently satisfies a(n) = 2a(n-1)+2a(n-2).

Table of values

List of values

cp's OEIS Frontend

A021006 Pisot sequence P(4,11), a(0)=4, a(1)=11, a(n+1) is the nearest integer to a(n)^2/a(n-1). Evidently satisfies a(n) = 2*a(n-1)+2*a(n-2).

Table of values

List of values

A021006 Pisot sequence P(4,11), a(0)=4, a(1)=11, a(n+1) is the nearest integer to a(n)^2/a(n-1). Evidently satisfies a(n) = 2a(n-1)+2a(n-2).