A140172 - cp's OEIS frontend

A140172 Powerful happy numbers; if a prime p divides n then p^2 must also divide n and also n must have trajectory under iteration of sum of squares of digits map includes 1.

n	a(n)
1	1
2	32
3	49
4	100
5	392
6	784
7	1000
8	1125
9	1152
10	1323
11	1444
12	1521
13	3200
14	3364
15	3456
16	4096
17	4225
18	4356
19	4563
20	4900
21	7225
22	7744
23	8281
24	8748
25	9604
26	10000
27	10125
28	10976
29	11025
30	12167
31	12321
32	12348
33	12996
34	13824
35	14112
36	14283
37	14641
38	15625
39	17424
40	17672
41	17956

[1, 32, 49, 100, 392, 784, 1000, 1125, 1152, 1323, 1444, 1521, 3200, 3364, 3456, 4096, 4225, 4356, 4563, 4900, 7225, 7744, 8281, 8748, 9604, 10000, 10125, 10976, 11025, 12167, 12321, 12348, 12996, 13824, 14112, 14283, 14641, 15625, 17424, 17672, 17956]

cp's OEIS Frontend

A140172 Powerful happy numbers; if a prime p divides n then p^2 must also divide n and also n must have trajectory under iteration of sum of squares of digits map includes 1.

Table of values

List of values