A079405 Number of dots in primes in Braille.

2, 2, 2, 4, 2, 3, 5, 3, 4, 4, 3, 6, 4, 5, 7, 4, 4, 4, 7, 5, 6, 6, 5, 5, 6, 5, 6, 8, 6, 4, 7, 4, 7, 5, 6, 4, 7, 6, 8, 7, 7, 5, 4, 5, 7, 5, 4, 6, 8, 6, 6, 6, 6, 5, 8, 7, 7, 7, 10, 6, 7, 6, 9, 4, 5, 7, 5, 8, 9, 7, 6, 6, 9, 8, 8, 7, 7, 8, 7, 8, 6, 6, 6, 7, 7, 8, 8, 9, 7, 8, 10, 9, 10, 6, 7, 7, 7, 5, 6, 6, 9, 8, 7, 7

Offset

0,1

Links

Table of n, a(n) for n=0..103.

American Foundation for the Blind, Braille Bug

Example

The 5th prime is 11, hence a(11)=1+1=2

Prog

(PARI) { braille=[3, 1, 2, 2, 3, 2, 3, 4, 3, 2]; forprime (n=2, 300, b=braille[n%10+1]; n2=n; if (n>99, b=b+braille[n\100+1]; n2=n%100); if (n2>9, b=b+braille[n2\10+1]); print1(b", ")) }
(PARI) { braille=[3, 1, 2, 2, 3, 2, 3, 4, 3, 2]; forprime (n=2, 300, n2=n; b=0; while (n2>0, b=b+braille[n2%10+1]; n2=n2\10); print1(b", ")) } \\ Sean A. Irvine, Feb 04 2010

Crossrefs

Cf. A079399, A072283.

Sequence in context: A181019 A066761 A108920 * A332347 A201353 A072048

Adjacent sequences: A079402 A079403 A079404 * A079406 A079407 A079408

Keyword

nonn

Author

Jon Perry, Feb 16 2003

Extensions

Corrected and extended by Sean A. Irvine, Feb 04 2010

Status

approved