A326376 - cp's OEIS frontend

A326376 Square array T(n, k) read by antidiagonals upwards, n > 0 and k > 0: for any number n > 0, let f(n) be the polynomial of a single indeterminate x where the coefficient of x^e is the prime(1+e)-adic valuation of n (where prime(k) denotes the k-th prime); f establishes a bijection between the positive numbers and the polynomials of a single indeterminate x with nonnegative integer coefficients; let g be the inverse of f; T(n, k) = g(f(n) o f(k)) (where o denotes function composition).

n	a(n)
1	1
2	2
3	1
4	1
5	2
6	1
7	4
8	2
9	2
10	1
11	1
12	4
13	3
14	2
15	1
16	2
17	2
18	4
19	4
20	2
21	1
22	1
23	4
24	5
25	4
26	5
27	2
28	1
29	8
30	2
31	6
32	16
33	4
34	6
35	2
36	1
37	1
38	8
39	7
40	8
41	11
42	4
43	7
44	2
45	1
46	2
47	4
48	8
49	256
50	10
51	90
52	4
53	8
54	2
55	1
56	1
57	4
58	9
59	8
60	17
61	12
62	17
63	4
64	9
65	2
66	1
67	4
68	2
69	10
70	16
71	8
72	47250
73	14
74	512
75	4
76	10
77	2
78	1
79	1
80	8

[1, 2, 1, 1, 2, 1, 4, 2, 2, 1, 1, 4, 3, 2, 1, 2, 2, 4, 4, 2, 1, 1, 4, 5, 4, 5, 2, 1, 8, 2, 6, 16, 4, 6, 2, 1, 1, 8, 7, 8, 11, 4, 7, 2, 1, 2, 4, 8, 256, 10, 90, 4, 8, 2, 1, 1, 4, 9, 8, 17, 12, 17, 4, 9, 2, 1, 4, 2, 10, 16, 8, 47250, 14, 512, 4, 10, 2, 1, 1, 8]

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