A081395 - cp's OEIS frontend

A081395 a(n) is the smallest value of k such that number of non-unitary prime divisors of k-th Catalan number, A000108(k) = C(2*k,k)/(k+1) equals n.

n	a(n)
0	1
1	6
2	13
3	25
4	72
5	96
6	182
7	320
8	481
9	923
10	1018
11	1321
12	1323
13	1670
14	3457
15	3455
16	3472
17	3464
18	3462
19	3469
20	8222
21	9991
22	12163
23	15838
24	17665
25	18313
26	18480
27	19458
28	19464
29	29708
30	36787
31	36796
32	36789
33	40048
34	43603
35	47210
36	47521
37	61653
38	61675
39	80722
40	87117
41	87120
42	92958
43	93181
44	93186
45	93187

[1, 6, 13, 25, 72, 96, 182, 320, 481, 923, 1018, 1321, 1323, 1670, 3457, 3455, 3472, 3464, 3462, 3469, 8222, 9991, 12163, 15838, 17665, 18313, 18480, 19458, 19464, 29708, 36787, 36796, 36789, 40048, 43603, 47210, 47521, 61653, 61675, 80722, 87117, 87120, 92958, 93181, 93186, 93187]

cp's OEIS Frontend

A081395 a(n) is the smallest value of k such that number of non-unitary prime divisors of k-th Catalan number, A000108(k) = C(2*k,k)/(k+1) equals n.

Table of values

List of values