A344146 - cp's OEIS frontend

A344146 a(n) is the number of pentanomials x^n + x^a + x^b + x^c + 1 that are irreducible over GF(2) for n > a > b > c > 0.

n	a(n)
4	1
5	4
6	6
7	10
8	17
9	22
10	38
11	46
12	54
13	66
14	73
15	98
16	94
17	152
18	124
19	158
20	199
21	184
22	226
23	296
24	202
25	406
26	328
27	334
28	418
29	380
30	486
31	584
32	351
33	666
34	578
35	658
36	896
37	604
38	728
39	964
40	577
41	1128
42	925
43	846
44	1286
45	898
46	1102
47	1520
48	760
49	1628
50	1421
51	1312
52	1837
53	1298
54	1580
55	2220
56	1142
57	2346
58	1764
59	1524
60	2782

[1, 4, 6, 10, 17, 22, 38, 46, 54, 66, 73, 98, 94, 152, 124, 158, 199, 184, 226, 296, 202, 406, 328, 334, 418, 380, 486, 584, 351, 666, 578, 658, 896, 604, 728, 964, 577, 1128, 925, 846, 1286, 898, 1102, 1520, 760, 1628, 1421, 1312, 1837, 1298, 1580, 2220, 1142, 2346, 1764, 1524, 2782]

cp's OEIS Frontend

A344146 a(n) is the number of pentanomials x^n + x^a + x^b + x^c + 1 that are irreducible over GF(2) for n > a > b > c > 0.

Table of values

List of values