A189803 - cp's OEIS frontend

A189803 Composite numbers n such that n'' = n'-1 where n' and n'' are the first and the second arithmetic derivative of n.

n	a(n)
1	9
2	185
3	341
4	377
5	437
6	9005
7	30413
8	33953
9	41009
10	51533
11	82673
12	92909
13	103073
14	126509
15	143009
16	165773
17	181793
18	184973
19	191309
20	228653
21	231713
22	246893
23	291233
24	311309
25	316973
26	319793
27	329357
28	353009
29	358433
30	374513
31	398093
32	405809
33	431009
34	460193
35	467309

[9, 185, 341, 377, 437, 9005, 30413, 33953, 41009, 51533, 82673, 92909, 103073, 126509, 143009, 165773, 181793, 184973, 191309, 228653, 231713, 246893, 291233, 311309, 316973, 319793, 329357, 353009, 358433, 374513, 398093, 405809, 431009, 460193, 467309]

cp's OEIS Frontend

A189803 Composite numbers n such that n'' = n'-1 where n' and n'' are the first and the second arithmetic derivative of n.

Table of values

List of values