A249398 - cp's OEIS frontend

A249398 Start with a(1) = 1; then a(n) = smallest number > a(n-1) such that a(n) divides concat(a(n-1),a(n)).

n	a(n)
1	1
2	2
3	4
4	5
5	10
6	20
7	25
8	50
9	100
10	125
11	200
12	250
13	400
14	500
15	625
16	1000
17	1250
18	2000
19	2500
20	3125
21	5000
22	6250
23	10000
24	12500
25	15625
26	20000
27	25000
28	31250
29	40000
30	50000
31	62500
32	78125
33	100000
34	125000
35	156250
36	200000
37	250000
38	312500
39	390625
40	500000
41	625000
42	781250
43	1000000

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 3125, 5000, 6250, 10000, 12500, 15625, 20000, 25000, 31250, 40000, 50000, 62500, 78125, 100000, 125000, 156250, 200000, 250000, 312500, 390625, 500000, 625000, 781250, 1000000]

cp's OEIS Frontend

A249398 Start with a(1) = 1; then a(n) = smallest number > a(n-1) such that a(n) divides concat(a(n-1),a(n)).

Table of values

List of values