factordb · sequences

Sequence

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whole sequence last 20 terms last term range to

Cycle

Aliquot variants · Bi-unitary · σ**(n) − n of 2560 length 11 Enters a cycle of length 2. ↓ .elf file

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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	4	2560	2⁹×5
1	Fully factored	4	3578	2×1789
↳	Continues Reaches 1792 and continues as that sequence.
2	Fully factored	4	1792	2⁸×7
3	Fully factored	4	2168	2³×271
4	Fully factored	4	1912	2³×239
↳	Continues Reaches 1688 and continues as that sequence.
5	Fully factored	4	1688	2³×211
↳	Continues Reaches 1492 and continues as that sequence.
6	Fully factored	4	1492	2²×373
↳	Merges Joins the sequence of 210 (at index 2 of that sequence) - the terms below continue there.
7	Fully factored	3	378	2×3³×7
8	Fully factored	3	582	2×3×97
↳	Continues Reaches 594 and continues as that sequence.
9	Fully factored	3	594	2×3³×11
10	Fully factored	3	846	2×3²×47
↳	Cycle Enters a cycle of length 2 - a cycle.

From the command linefdb · curl

fdb

fdb seq view '2560' --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":"2560"},"type":59,"part":"last20","fr":0}}'