factordbrpc · fdb
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Terminates
Aliquot variants · Quasi · σ(n) − n − 1 of 20802 length 13 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.
nStatus DigitsTermFactorization
0 Fully factored 5 20802 2×3×3467
1 Fully factored 5 20813 13×1601
↳ Continues Reaches 1614 and continues as that sequence.
2 Fully factored 4 1614 2×3×269
↳ Merges Joins the sequence of 1110 (at index 1 of that sequence) - the terms below continue there.
3 Fully factored 4 1625 53×13
↳ Continues Reaches 558 and continues as that sequence.
4 Fully factored 3 558 2×32×31
↳ Merges Joins the sequence of 392 (at index 2 of that sequence) - the terms below continue there.
5 Fully factored 3 689 13×53
↳ Continues Reaches 66 and continues as that sequence.
6 Fully factored 2 66 2×3×11
7 Fully factored 2 77 7×11
↳ Continues Reaches 18 and continues as that sequence.
8 Fully factored 2 18 2×32
9 Fully factored 2 20 22×5
10 Fully factored 2 21 3×7
↳ Continues Reaches 10 and continues as that sequence.
11 Fully factored 2 10 2×5
↳ Continues Reaches 7 and continues as that sequence.
12 Fully factored 1 7 7
13 terminus 1 0 -
↳ Terminates The sequence reaches a prime and terminates.
From the command linefdb · curl
fdb
fdb seq view '20802' --type 55 --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":"20802"},"type":55,"part":"last20","fr":0}}'