A133192 Numbers that require exactly five chisel strokes when written in Roman numerals.

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

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: A335167 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