A258584 - cp's OEIS frontend

A258584 Numbers n such that n = Sum_{j>=1} c(j) where c(0) = n, c(j) = floor(c(j-1)/10^k)*(c(j-1) mod 10^k) for j>0, and k is half the number of digits of n, rounded up if the number of digits of n is odd.

n	a(n)
1	86
2	860
3	1975
4	2160
5	3575
6	19750
7	21600
8	35750
9	43614
10	51884
11	65625
12	479900
13	868688
14	967750
15	1435575
16	1548384
17	1696875
18	4799000
19	8686880
20	9677500
21	28874200
22	34095100
23	38748800
24	39214560
25	47613625
26	53415625
27	148385715
28	156293216
29	288742000
30	340951000
31	387488000

[86, 860, 1975, 2160, 3575, 19750, 21600, 35750, 43614, 51884, 65625, 479900, 868688, 967750, 1435575, 1548384, 1696875, 4799000, 8686880, 9677500, 28874200, 34095100, 38748800, 39214560, 47613625, 53415625, 148385715, 156293216, 288742000, 340951000, 387488000]

cp's OEIS Frontend

A258584 Numbers n such that n = Sum_{j>=1} c(j) where c(0) = n, c(j) = floor(c(j-1)/10^k)*(c(j-1) mod 10^k) for j>0, and k is half the number of digits of n, rounded up if the number of digits of n is odd.

Table of values

List of values