A172447 - cp's OEIS frontend

A172447 a(n) = (-1 + 52^(2n + 1) - 3*n)/9.

n	a(n)
0	1
1	4
2	17
3	70
4	283
5	1136
6	4549
7	18202
8	72815
9	291268
10	1165081
11	4660334
12	18641347
13	74565400
14	298261613
15	1193046466
16	4772185879
17	19088743532
18	76354974145
19	305419896598
20	1221679586411
21	4886718345664
22	19546873382677
23	78187493530730
24	312749974122943
25	1250999896491796

[1, 4, 17, 70, 283, 1136, 4549, 18202, 72815, 291268, 1165081, 4660334, 18641347, 74565400, 298261613, 1193046466, 4772185879, 19088743532, 76354974145, 305419896598, 1221679586411, 4886718345664, 19546873382677, 78187493530730, 312749974122943, 1250999896491796]

cp's OEIS Frontend

A172447 a(n) = (-1 + 52^(2n + 1) - 3*n)/9.

Table of values

List of values

cp's OEIS Frontend

A172447 a(n) = (-1 + 5*2^(2*n + 1) - 3*n)/9.

Table of values

List of values

A172447 a(n) = (-1 + 52^(2n + 1) - 3*n)/9.