A380951 - cp's OEIS frontend

A380951 a(n) = 2^(2n - HammingWeight(n)) [x^n] ((1 - x)^(-5/2) - (x - 1)^(-2)).

n	a(n)
0	0
1	1
2	11
3	41
4	515
5	1467
6	7847
7	20081
8	397923
9	961255
10	4552845
11	10609519
12	97582823
13	221879063
14	999384495
15	2232200321
16	79200753059
17	174525593247
18	764867505329
19	1667683433315
20	14479516479981
21	31302413221189
22	134846186300129
23	289480028851479
24	4956344862563975
25	10577819852813291

[0, 1, 11, 41, 515, 1467, 7847, 20081, 397923, 961255, 4552845, 10609519, 97582823, 221879063, 999384495, 2232200321, 79200753059, 174525593247, 764867505329, 1667683433315, 14479516479981, 31302413221189, 134846186300129, 289480028851479, 4956344862563975, 10577819852813291]

cp's OEIS Frontend

A380951 a(n) = 2^(2n - HammingWeight(n)) [x^n] ((1 - x)^(-5/2) - (x - 1)^(-2)).

Table of values

List of values

cp's OEIS Frontend

A380951 a(n) = 2^(2*n - HammingWeight(n)) * [x^n] ((1 - x)^(-5/2) - (x - 1)^(-2)).

Table of values

List of values

A380951 a(n) = 2^(2n - HammingWeight(n)) [x^n] ((1 - x)^(-5/2) - (x - 1)^(-2)).