A057781 - cp's OEIS frontend

A057781 a(n) = n^4+4 = (n^2-2n+2)(n^2+2n+2) = ((n-1)^2+1)((n+1)^2+1).

n	a(n)
0	4
1	5
2	20
3	85
4	260
5	629
6	1300
7	2405
8	4100
9	6565
10	10004
11	14645
12	20740
13	28565
14	38420
15	50629
16	65540
17	83525
18	104980
19	130325
20	160004
21	194485
22	234260
23	279845
24	331780
25	390629
26	456980
27	531445
28	614660
29	707285
30	810004
31	923525
32	1048580
33	1185925

[4, 5, 20, 85, 260, 629, 1300, 2405, 4100, 6565, 10004, 14645, 20740, 28565, 38420, 50629, 65540, 83525, 104980, 130325, 160004, 194485, 234260, 279845, 331780, 390629, 456980, 531445, 614660, 707285, 810004, 923525, 1048580, 1185925]

cp's OEIS Frontend

A057781 a(n) = n^4+4 = (n^2-2n+2)(n^2+2n+2) = ((n-1)^2+1)((n+1)^2+1).

Table of values

List of values

cp's OEIS Frontend

A057781 a(n) = n^4+4 = (n^2-2*n+2)*(n^2+2*n+2) = ((n-1)^2+1)*((n+1)^2+1).

Table of values

List of values

A057781 a(n) = n^4+4 = (n^2-2n+2)(n^2+2n+2) = ((n-1)^2+1)((n+1)^2+1).