A360820 - cp's OEIS frontend

A360820 a(n) = Sum_{k=0..n} binomial(n, k)2^(n^2-k(n-k)).

n	a(n)
0	1
1	4
2	48
3	1792
4	221184
5	98566144
6	173946175488
7	1281755680079872
8	39534286378918477824
9	5018464395368794081460224
10	2586745980900067184722499862528
11	5375203895735606878055792019528220672
12	44865714160227204455469409035569750630989824
13	1501355804811017489524770237231795462175548447391744

[1, 4, 48, 1792, 221184, 98566144, 173946175488, 1281755680079872, 39534286378918477824, 5018464395368794081460224, 2586745980900067184722499862528, 5375203895735606878055792019528220672, 44865714160227204455469409035569750630989824, 1501355804811017489524770237231795462175548447391744]

cp's OEIS Frontend

A360820 a(n) = Sum_{k=0..n} binomial(n, k)2^(n^2-k(n-k)).

Table of values

List of values

cp's OEIS Frontend

A360820 a(n) = Sum_{k=0..n} binomial(n, k)*2^(n^2-k*(n-k)).

Table of values

List of values

A360820 a(n) = Sum_{k=0..n} binomial(n, k)2^(n^2-k(n-k)).