A321350 - cp's OEIS frontend

A321350 Triangle read by rows: first row is 2; given row k, define the elements of row k+1 to be the (sorted) elements derived from row k by two recursion rules: (i.) if x is in row k, then (x+3)^2 is in row k+1; (ii.) if x^2 is in row k, then x is in row k+1.

n	a(n)
1	2
2	25
3	5
4	784
5	28
6	64
7	619369
8	8
9	787
10	961
11	4489
12	383621674384
13	31
14	67
15	121
16	619372
17	624100
18	929296
19	20178064
20	147165589059485451825769
21	11
22	790
23	964
24	1156
25	4492
26	4900
27	15376
28	383621674387
29	383625390625
30	389504554609
31	863596631401
32	407154387856489
33	21657710603225344113280242498332241368243395984

[2, 25, 5, 784, 28, 64, 619369, 8, 787, 961, 4489, 383621674384, 31, 67, 121, 619372, 624100, 929296, 20178064, 147165589059485451825769, 11, 790, 964, 1156, 4492, 4900, 15376, 383621674387, 383625390625, 389504554609, 863596631401, 407154387856489, 21657710603225344113280242498332241368243395984]

cp's OEIS Frontend

A321350 Triangle read by rows: first row is 2; given row k, define the elements of row k+1 to be the (sorted) elements derived from row k by two recursion rules: (i.) if x is in row k, then (x+3)^2 is in row k+1; (ii.) if x^2 is in row k, then x is in row k+1.

Table of values

List of values