factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Aliquot variants · Augmented · σ(n) − n + 1 of 200 length 7 The sequence reaches the fixed point 2. ↓ .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	200	2³×5²
1	Fully factored	3	266	2×7×19
2	Fully factored	3	215	5×43
↳	Continues Reaches 50 and continues as that sequence.
3	Fully factored	2	50	2×5²
↳	Continues Reaches 44 and continues as that sequence.
4	Fully factored	2	44	2²×11
↳	Continues Reaches 41 and continues as that sequence.
5	Fully factored	2	41	41
↳	Continues Reaches 2 and continues as that sequence.
6	Fully factored	1	2	2
7	terminus	1	0	-
↳	Terminates The sequence reaches the fixed point 2 and terminates.

From the command linefdb · curl

fdb

fdb seq view '200' --type 54 --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":"200"},"type":54,"part":"last20","fr":0}}'