The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A238365 Number of dots needed to express n as a Roman numeral in Braille. 0
 2, 4, 6, 6, 4, 6, 8, 10, 6, 4, 6, 8, 10, 10, 8, 10, 12, 14, 10, 8, 10, 12, 14, 14, 12, 14, 16, 18, 14, 12, 14, 16, 18, 18, 16, 18, 20, 22, 18, 7, 9, 11, 13, 13, 11, 13, 15, 17, 13, 3, 5, 7, 9, 9, 7, 9, 11, 13, 9, 7, 9, 11, 13, 13, 11, 13, 15, 17, 13, 11, 13, 15 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Wikipedia, Braille EXAMPLE VII in Braille (with the "Roman num" character):   o  o      o    o      o    o    o   o  o o Therefore a(7) = 10 - 2 = 8. PROG (PARI) a=[2, 4, 6, 6, 4, 6, 8, 10, 6, 0]; b=[0, 4, 8, 12, 7, 3, 7, 11, 15, 6]; for(n=1, 72, if(n<100, print1(a[lift(Mod(n-1, 10))+1]+b[floor(n/10)+1], ", "), break)); (PARI) /* The program works for n < 40 */ b=0; for(n=1, 39, if(Mod(n, 10)==0, b=b+4); m=lift(Mod(n, 10)); a=2*m-6; if(Mod(m, 5)==4, d=abs(a-7)+b+1, if(m<4, d=a+b+6, d=a+b)); print1(d, ", ")); CROSSREFS Cf. also A002963, A048181, A030166, A072283, A079399, A121018, A220090. Sequence in context: A011031 A248844 A257821 * A259935 A054584 A049041 Adjacent sequences:  A238362 A238363 A238364 * A238366 A238367 A238368 KEYWORD nonn,word,base AUTHOR Arkadiusz Wesolowski, Feb 25 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 27 08:39 EDT 2021. Contains 347689 sequences. (Running on oeis4.)