A220448 - cp's OEIS frontend

A220448 Define a sequence u(n) by u(1)=1; thereafter u(n) = f(n)/f(n-1) where f(n) = (-1)^(n+1)*A105750(n); sequence gives numerator(u(n)).

n	a(n)
1	1
2	1
3	-10
4	-1
5	19
6	-73
7	662
8	-2795
9	281
10	-4511
11	21746
12	-322921
13	1035215
14	-720817
15	1077518
16	-87995911
17	-34376687
18	929280875
19	-92673902
20	6986985769
21	-33833494045
22	243540693677
23	-1817775985570
24	13097400661955
25	-27199287430171
26	8249498995171439
27	-112427012362483262
28	3008079144099400625
29	-10365435567354511181

[1, 1, -10, -1, 19, -73, 662, -2795, 281, -4511, 21746, -322921, 1035215, -720817, 1077518, -87995911, -34376687, 929280875, -92673902, 6986985769, -33833494045, 243540693677, -1817775985570, 13097400661955, -27199287430171, 8249498995171439, -112427012362483262, 3008079144099400625, -10365435567354511181]

cp's OEIS Frontend

A220448 Define a sequence u(n) by u(1)=1; thereafter u(n) = f(n)/f(n-1) where f(n) = (-1)^(n+1)*A105750(n); sequence gives numerator(u(n)).

Table of values

List of values