factordb · sequences

Sequence

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whole sequence last 20 terms last term range to

Terminates

Aliquot variants · Bi-unitary · σ**(n) − n of 160 length 9 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	3	160	2⁵×5
1	Fully factored	3	218	2×109
↳	Continues Reaches 112 and continues as that sequence.
2	Fully factored	3	112	2⁴×7
↳	Continues Reaches 104 and continues as that sequence.
3	Fully factored	3	104	2³×13
4	Fully factored	3	106	2×53
↳	Continues Reaches 56 and continues as that sequence.
5	Fully factored	2	56	2³×7
6	Fully factored	2	64	2⁶
↳	Continues Reaches 55 and continues as that sequence.
7	Fully factored	2	55	5×11
↳	Continues Reaches 17 and continues as that sequence.
8	Fully factored	2	17	17
9	terminus	1	0	-
↳	Terminates The sequence reaches a prime and terminates.

From the command linefdb · curl

fdb

fdb seq view '160' --type 59 --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":"160"},"type":59,"part":"last20","fr":0}}'