A273913 - cp's OEIS frontend

A273913 Consider the sequence b(k) with initial values b(1) = 1 and b(2) = n and satisfying b(k) = b(k-1) + Pd(b(k-2)), where Pd(x) is the product of the digits of x. Then b(k) eventually becomes constant, and this constant is a(n).

n	a(n)
1	1902
2	1902
3	730
4	230
5	550
6	420
7	502
8	1902
9	2150
10	1074
11	1074
12	1074
13	1902
14	1902
15	8170
16	730
17	550
18	730
19	600
20	230
21	80
22	230
23	470
24	550
25	1074
26	4045
27	4990
28	180
29	230
30	106
31	90
32	4990
33	1062
34	102
35	902
36	1230
37	730
38	108
39	1406
40	1017
41	1410
42	630
43	2038
44	505
45	230
46	1810
47	150
48	2306
49	630

[1902, 1902, 730, 230, 550, 420, 502, 1902, 2150, 1074, 1074, 1074, 1902, 1902, 8170, 730, 550, 730, 600, 230, 80, 230, 470, 550, 1074, 4045, 4990, 180, 230, 106, 90, 4990, 1062, 102, 902, 1230, 730, 108, 1406, 1017, 1410, 630, 2038, 505, 230, 1810, 150, 2306, 630]

cp's OEIS Frontend

A273913 Consider the sequence b(k) with initial values b(1) = 1 and b(2) = n and satisfying b(k) = b(k-1) + Pd(b(k-2)), where Pd(x) is the product of the digits of x. Then b(k) eventually becomes constant, and this constant is a(n).

Table of values

List of values