A079108 - OEIS

A079108

Number of 1's in the base 8 form of A077722(n).

3, 3, 3, 4, 3, 4, 5, 4, 5, 3, 4, 3, 5, 5, 5, 4, 3, 4, 5, 5, 5, 4, 5, 5, 4, 3, 4, 5, 5, 6, 6, 4, 5, 6, 8, 4, 5, 6, 6, 5, 3, 4, 4, 5, 6, 5, 3, 4, 6, 5, 6, 8, 6, 5, 4, 6, 8, 5, 5, 5, 6, 6, 8, 3, 4, 5, 4, 6, 6, 5, 6, 8, 4, 5, 5, 6, 5, 8, 4, 6, 8, 6, 8, 6, 8, 8, 8, 5, 6, 6, 5, 5, 5, 8, 4, 6, 6, 8, 8, 9, 6, 8, 5, 5, 4

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

EXAMPLE

a(5)=3 since A077722(5)=32833, which has an octal form of 100101, which has 3 ones.

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] := sum(b[i], i=1..nops(b)):fi:od:seq(a[k], k=1..s);

CROSSREFS

Cf. A077722.

Sequence in context: A084501 A198020 A098037 * A165605 A230194 A128112

Adjacent sequences: A079105 A079106 A079107 * A079109 A079110 A079111

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

More terms from Sascha Kurz, Feb 10 2003

STATUS

approved