A224749 - cp's OEIS frontend

A224749 Vauban's sequence: a(n)=0 if n<=0, a(1)=1; thereafter a(n) = 3a(n-1) + 6a(n-2) + 6a(n-3) + 6a(n-4) + 6*a(n-5).

n	a(n)
0	0
1	1
2	3
3	15
4	69
5	321
6	1491
7	6921
8	32139
9	149229
10	692919
11	3217437
12	14939559
13	69369021
14	322101927
15	1495619397
16	6944625855
17	32246056989
18	149728468167
19	695235829509
20	3228196110975
21	14989518216045
22	69600993441975
23	323179052074101
24	1500620817813327
25	6967849012498557
26	32353889326768359

[0, 1, 3, 15, 69, 321, 1491, 6921, 32139, 149229, 692919, 3217437, 14939559, 69369021, 322101927, 1495619397, 6944625855, 32246056989, 149728468167, 695235829509, 3228196110975, 14989518216045, 69600993441975, 323179052074101, 1500620817813327, 6967849012498557, 32353889326768359]

cp's OEIS Frontend

A224749 Vauban's sequence: a(n)=0 if n<=0, a(1)=1; thereafter a(n) = 3a(n-1) + 6a(n-2) + 6a(n-3) + 6a(n-4) + 6*a(n-5).

Table of values

List of values

cp's OEIS Frontend

A224749 Vauban's sequence: a(n)=0 if n<=0, a(1)=1; thereafter a(n) = 3*a(n-1) + 6*a(n-2) + 6*a(n-3) + 6*a(n-4) + 6*a(n-5).

Table of values

List of values

A224749 Vauban's sequence: a(n)=0 if n<=0, a(1)=1; thereafter a(n) = 3a(n-1) + 6a(n-2) + 6a(n-3) + 6a(n-4) + 6*a(n-5).