factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Prime-stopping maps · σ(n) − 1 until a prime of 49 length 5 The sequence reaches a prime. ↓ .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	2	49	7²
1	Fully factored	2	56	2³×7
↳	Merges Joins the sequence of 32 (at index 3 of that sequence) - the terms below continue there.
2	Fully factored	3	119	7×17
3	Fully factored	3	143	11×13
4	Fully factored	3	167	167
↳	Terminates The sequence reaches a prime and terminates.

From the command linefdb · curl

fdb

fdb seq view '49' --type 122 --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":"49"},"type":122,"part":"last20","fr":0}}'