A172388 - cp's OEIS frontend

A172388 a(n) = Sum_{k=0..n} (-1)^kC(n,k)2^(k*(n-k)).

n	a(n)
0	1
1	0
2	-2
3	0
4	34
5	0
6	-2942
7	0
8	1144834
9	0
10	-1906714622
11	0
12	13264071114754
13	0
14	-380188784001777662
15	0
16	44530311225683389448194
17	0
18	-21199108233888497863938801662
19	0
20	40869840581497696551494454452682754

[1, 0, -2, 0, 34, 0, -2942, 0, 1144834, 0, -1906714622, 0, 13264071114754, 0, -380188784001777662, 0, 44530311225683389448194, 0, -21199108233888497863938801662, 0, 40869840581497696551494454452682754]

cp's OEIS Frontend

A172388 a(n) = Sum_{k=0..n} (-1)^kC(n,k)2^(k*(n-k)).

Table of values

List of values

cp's OEIS Frontend

A172388 a(n) = Sum_{k=0..n} (-1)^k*C(n,k)*2^(k*(n-k)).

Table of values

List of values

A172388 a(n) = Sum_{k=0..n} (-1)^kC(n,k)2^(k*(n-k)).