factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Aliquot variants · Augmented · σ(n) − n + 1 of 756 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	756	2²×3³×7
1	Fully factored	4	1485	3³×5×11
2	Fully factored	4	1396	2²×349
3	Fully factored	4	1055	5×211
↳	Continues Reaches 218 and continues as that sequence.
4	Fully factored	3	218	2×109
↳	Continues Reaches 113 and continues as that sequence.
5	Fully factored	3	113	113
↳	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 '756' --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":"756"},"type":54,"part":"last20","fr":0}}'