A168087 a(n) = the smallest number whose Welsh name in the modern Decimal System contains n letters of the alphabet.

1, 2, 3, 7, 4, 11, 12, 15, 16, 14, 27, 24, 47, 44, 127, 124, 147, 144, 224

Offset

2,2

Comments

The table below shows the dervivation of the sequence:

..n..Smallest.Number..Welsh.Name

..2.........1.........un

..3.........2.........dau.(m)./.dwy.(f)

..4.........3.........tair.(f)

..5.........7.........saith

..6.........4.........pedwar.(m)./.pedair.(f)

..7........11.........un.deg.un

..8........12.........un.deg.dau

..9........15.........un.deg.pump

.10........16.........un.deg.saith

.11........14.........un.deg.pedwar

.12........27.........dau.ddeg.saith

.13........24.........dau.ddeg.pedwar

.14........47.........pedwar.deg.saith

.15........44.........pedwar.deg.pedwar

.16.......127.........cant.dau.ddeg.saith

.17.......124.........cant.dau.ddeg.pedwar

.18.......147.........cant.pedwar.deg.saith

.19.......144.........cant.pedwar.deg.pedwar

.20.......224.........dau.gant.dau.ddeg.pedwar

Links

Table of n, a(n) for n=2..20.

TAKASUGI Shinji, The Number System of Welsh (Modern)

Crossrefs

Sequence in context: A118810 A357482 A026259 * A168085 A287950 A287628

Adjacent sequences: A168084 A168085 A168086 * A168088 A168089 A168090

Keyword

nonn,word

Author

Christopher Hunt Gribble, Nov 18 2009

Status

approved