A003222 - cp's OEIS frontend

A003222 a(n) = 2^(3n+1) - 2n(2n+1).

n	a(n)
0	2
1	10
2	108
3	982
4	8120
5	65426
6	524132
7	4194094
8	33554160
9	268435114
10	2147483228
11	17179868678
12	137438952872
13	1099511627074
14	8796093021396
15	70368744176734
16	562949953420256
17	4503599627369306
18	36028797018962636
19	288230376151710262
20	2305843009213692312
21	18446744073709549810

[2, 10, 108, 982, 8120, 65426, 524132, 4194094, 33554160, 268435114, 2147483228, 17179868678, 137438952872, 1099511627074, 8796093021396, 70368744176734, 562949953420256, 4503599627369306, 36028797018962636, 288230376151710262, 2305843009213692312, 18446744073709549810]

cp's OEIS Frontend

A003222 a(n) = 2^(3n+1) - 2n(2n+1).

Table of values

List of values

cp's OEIS Frontend

A003222 a(n) = 2^(3*n+1) - 2*n*(2*n+1).

Table of values

List of values

A003222 a(n) = 2^(3n+1) - 2n(2n+1).