A371684 - cp's OEIS frontend

A371684 a(n) = Sum_{k=0..n} 2^(3k)binomial(2n, 2k)Euler(2k, 1/2). Alternating row sums of A371637.

n	a(n)
0	1
1	-1
2	9
3	-217
4	9841
5	-717841
6	76804665
7	-11330490025
8	2204195526241
9	-546715992537505
10	168397490614671849
11	-63062013420332052985
12	28216110792407667898321
13	-14866226664969958126495921
14	9109882748673411939937074969
15	-6424247756451800785395922510537

[1, -1, 9, -217, 9841, -717841, 76804665, -11330490025, 2204195526241, -546715992537505, 168397490614671849, -63062013420332052985, 28216110792407667898321, -14866226664969958126495921, 9109882748673411939937074969, -6424247756451800785395922510537]

cp's OEIS Frontend

A371684 a(n) = Sum_{k=0..n} 2^(3k)binomial(2n, 2k)Euler(2k, 1/2). Alternating row sums of A371637.

Table of values

List of values

cp's OEIS Frontend

A371684 a(n) = Sum_{k=0..n} 2^(3*k)*binomial(2*n, 2*k)*Euler(2*k, 1/2). Alternating row sums of A371637.

Table of values

List of values

A371684 a(n) = Sum_{k=0..n} 2^(3k)binomial(2n, 2k)Euler(2k, 1/2). Alternating row sums of A371637.