wikipedia
Ēadig getæl is gesƿeotolod fram þǣm folgendum forþgange.  Ǣnig getæl þe ƿanaþ tō ānum (1) gif man nime þā ætīecunge þǣre fēoƿerefnettunge his rīma and onginne gelōmlǣcan ōþ þe hit gifþ ān (1) is ēadig getæl, and ǣnig getæl þe þæt ne cann nis ēadig getæl.  Spærcletelles sōcn oþ 1020 manaþ, þæt hūhƿēga 12% getala sind ēadig, þēah þe nāne fandunge ƿāt man .

Fruman

Base-dependent integer sequences
Rīmcræft