A110879 - cp's OEIS frontend

A110879 Let a_0 = 1 and for n > 0, let a_n be the smallest positive integer not already in the sequence such that (a_0 + a_1 x + a-2x^2 + ....)^(1/3) has integer coefficients. (Hanna's A083349). Let f(n) = n th term in the present sequence. Then a_0 + a_1 x + a_2 x^2 + ... = (1-x)^f(1) (1-x^2)^f(2) (1-x^3)^f(3) ....

n	a(n)
1	-1
2	-2
3	-3
4	5
5	1
6	-3
7	-3
8	7
9	6
10	-7
11	-23
12	15
13	12
14	28
15	-48
16	-25
17	-10
18	165
19	4
20	-274
21	-408
22	927
23	932
24	-1179
25	-3745
26	2906
27	7620
28	-1471
29	-21283
30	1593
31	40509
32	18877
33	-93870
34	-53839
35	153551
36	204285
37	-293171
38	-462306
39	307359
40	1227141
41	-282147
42	-2368041
43	-1025023
44	5041701
45	4100247
46	-7457707
47	-15096708

[-1, -2, -3, 5, 1, -3, -3, 7, 6, -7, -23, 15, 12, 28, -48, -25, -10, 165, 4, -274, -408, 927, 932, -1179, -3745, 2906, 7620, -1471, -21283, 1593, 40509, 18877, -93870, -53839, 153551, 204285, -293171, -462306, 307359, 1227141, -282147, -2368041, -1025023, 5041701, 4100247, -7457707, -15096708]

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