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A079107 Number of digits of A077722(n) written in base 8. 0
3, 4, 4, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..83.

EXAMPLE

a(5)=6 since A077722(5)=32833, which has an octal form of 100101 (6 digits).

MAPLE

s := 0:for n from 1 to 7000 do b := convert(n, base, 2): q := sum(b[i]*8^(i-1), i=1..nops(b)): if(isprime(q)) then s := s+1:a[s] := nops(b):fi: od:seq(a[k], k=1..s);

CROSSREFS

Cf. A077722.

Sequence in context: A204002 A198300 A054760 * A205837 A262872 A257923

Adjacent sequences:  A079104 A079105 A079106 * A079108 A079109 A079110

KEYWORD

nonn,base

AUTHOR

Francois Jooste (phukraut(AT)hotmail.com), Dec 23 2002

EXTENSIONS

More terms from Sascha Kurz, Feb 10 2003

STATUS

approved

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Last modified December 9 23:16 EST 2016. Contains 278993 sequences.