A308687 - cp's OEIS frontend

A308687 a(n) = A305312(n)/4 if A305312(n)is even and a(n) = (A305312(n) - 1)/4 if A305312(n) is odd, for n >= 1.

n	a(n)
1	1
2	8
3	55
4	379
5	1891
6	2600
7	17821
8	64261
9	84680
10	122149
11	421849
12	837224
13	2183005
14	3950155
15	5738419
16	18883369
17	39331711
18	74157931
19	94070600
20	128629621
21	185381839
22	269583560
23	486268651
24	1847753209
25	2519186671
26	3192137000
27	4210906771
28	6000283981
29	8707689224
30	12664688905
31	20977322059
32	41089519729
33	85578188905
34	86805069128
35	195388310755
36	409067053471

[1, 8, 55, 379, 1891, 2600, 17821, 64261, 84680, 122149, 421849, 837224, 2183005, 3950155, 5738419, 18883369, 39331711, 74157931, 94070600, 128629621, 185381839, 269583560, 486268651, 1847753209, 2519186671, 3192137000, 4210906771, 6000283981, 8707689224, 12664688905, 20977322059, 41089519729, 85578188905, 86805069128, 195388310755, 409067053471]

cp's OEIS Frontend

A308687 a(n) = A305312(n)/4 if A305312(n)is even and a(n) = (A305312(n) - 1)/4 if A305312(n) is odd, for n >= 1.

Table of values

List of values