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A168085 a(n) = the smallest number whose Welsh name in the traditional Vigesimal System contains n letters of the alphabet. 1
1, 2, 3, 7, 4, 12, 11, 13, 21, 16, 14, 27, 24, 19, 31, 33, 73, 36, 34 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

The table below shows the derivation 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........12.........deuddeg

..8........11.........un.ar.ddeg

..9........13.........tri.ar.ddeg

.10........21.........un.ar.hugain

.11........16.........un.ar.bymtheg

.12........14.........pedwar.ar.ddeg

.13........27.........saith.ar.hugain

.14........24.........pedwar.ar.hugain

.15........19.........pedwar.ar.bymtheg

.16........31.........un.ar.ddeg.ar.hugain

.17........33.........tri.ar.ddeg.ar.hugain

.18........73.........tri.ar.ddeg.a.thrigain

.19........36.........un.ar.bymtheg.ar.hugain

.20........34.........pedwar.ar.ddeg.ar.hugain

LINKS

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

TAKASUGI Shinji, The Number System of Welsh (Traditional)

CROSSREFS

Sequence in context: A118810 A026259 A168087 * A287950 A287628 A319863

Adjacent sequences:  A168082 A168083 A168084 * A168086 A168087 A168088

KEYWORD

nonn,word

AUTHOR

Christopher Hunt Gribble, Nov 18 2009

STATUS

approved

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Last modified August 11 20:13 EDT 2022. Contains 356067 sequences. (Running on oeis4.)