factordb · sequences

Sequence

Start with

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whole sequence last 20 terms last term range to

Terminates

Mid-divisor concatenation · Base 3 of 405 length 7 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	405	3⁴×5
1	Fully factored	4	1242	2×3³×23
2	Fully factored	4	2233	7×11×29
3	Fully factored	4	2426	2×1213
4	Fully factored	4	5587	37×151
5	Fully factored	4	9142	2×7×653
6	Fully factored	5	10859	10859
↳	Terminates The sequence reaches a prime and terminates.

From the command linefdb · curl

fdb

fdb seq view '405' --type 141 --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":"405"},"type":141,"part":"last20","fr":0}}'