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A133192 Numbers that require exactly five chisel strokes when written in Roman numerals. 0
8, 13, 14, 16, 19, 21, 41, 53, 54, 56, 59, 61, 91, 103, 104, 106, 109, 111, 151, 201, 400, 502, 505, 510, 550, 600, 1001, 5002, 5005, 5010, 5050, 5100, 10002, 10005, 10010, 10050, 10100, 50002, 50005, 50010, 50050, 50100, 100002, 100005, 100010, 100050, 100100, 500001, 1000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

FORMULA

Numbers n such that A002963(n) = 5.

EXAMPLE

Chisel strokes for numerals: I,1; V,2; X,2; L,2; C ( = < ),2; D,3; M,4; 5000 is V with a line over it, 3; 10000 is X with a line over it, 3; 50000 is L with a line over it, 3; 100000 is L with a line over it, 3; 500000 is D with a line over it, 4; 1000000 is M with a line over it, 5. Numerals with two horizontal strokes over them were not common in historical Rome. A002964 has a different evaluation of the strokes of C, as does A118098.

CROSSREFS

Cf. A002963, A002964, A118098.

Sequence in context: A070476 A124159 A128662 * A063684 A059194 A253775

Adjacent sequences:  A133189 A133190 A133191 * A133193 A133194 A133195

KEYWORD

base,fini,full,nonn

AUTHOR

Jonathan Vos Post, Oct 09 2007

STATUS

approved

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Last modified October 19 13:01 EDT 2019. Contains 328222 sequences. (Running on oeis4.)