A331778 - cp's OEIS frontend

A331778 Denominators of coefficients in asymptotic expansion of exp(2*(H_k-gamma))/k^2 in powers of 1/k, where H_k are the harmonic numbers A001008/A002805 and gamma is the Euler-Mascheroni constant A001620.

n	a(n)
0	1
1	1
2	3
3	1
4	90
5	90
6	567
7	5670
8	340200
9	113400
10	11226600
11	5613300
12	91945854000
13	18389170800
14	137918781000
15	13135122000
16	562708626480000
17	11483849520000
18	2020686677689680000
19	505171669422420000
20	3334133018187972000000
21	370459224243108000000
22	115027589127485034000000

[1, 1, 3, 1, 90, 90, 567, 5670, 340200, 113400, 11226600, 5613300, 91945854000, 18389170800, 137918781000, 13135122000, 562708626480000, 11483849520000, 2020686677689680000, 505171669422420000, 3334133018187972000000, 370459224243108000000, 115027589127485034000000]

cp's OEIS Frontend

A331778 Denominators of coefficients in asymptotic expansion of exp(2*(H_k-gamma))/k^2 in powers of 1/k, where H_k are the harmonic numbers A001008/A002805 and gamma is the Euler-Mascheroni constant A001620.

Table of values

List of values