factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Aliquot of 320 length 14 The sequence reaches 1. ↓ .elf file

Show sequence-development graph

Term size (digits) across the sequence — How the sequence develops - decimal digits of each term vs iteration.

n	Status	Digits	Term	Factorization
0	Fully factored	3	320	2⁶×5
1	Fully factored	3	442	2×13×17
↳	Drops below start Descends to 314 and continues as that sequence.
2	Fully factored	3	314	2×157
↳	Drops below start Descends to 160 and continues as that sequence.
3	Fully factored	3	160	2⁵×5
4	Fully factored	3	218	2×109
↳	Drops below start Descends to 112 and continues as that sequence.
5	Fully factored	3	112	2⁴×7
↳	Merges Joins the aliquot sequence of 60 (at index 3 of that sequence) - the terms below continue there.
6	Fully factored	3	136	2³×17
7	Fully factored	3	134	2×67
8	Fully factored	2	70	2×5×7
9	Fully factored	2	74	2×37
↳	Drops below start Descends to 40 and continues as that sequence.
10	Fully factored	2	40	2³×5
11	Fully factored	2	50	2×5²
12	Fully factored	2	43	43
13	unit	1	1	-
14	terminus	1	0	-
↳	Terminates The sequence reaches 1 and terminates.

From the command linefdb · curl

fdb

fdb seq view '320' --type 1 --part last20

curl

curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"sequence_view","params":{"start":{"expr":"320"},"type":1,"part":"last20","fr":0}}'