A075145 Prime basis of A061373.

2, 3, 5, 6, 8, 8, 9, 9, 11, 11, 11, 11, 12, 12, 14, 13, 14, 13, 14, 14, 13, 14, 15, 15, 14, 15, 15, 16, 14, 15, 15, 16, 16, 17, 16, 16, 16, 15, 18, 17, 18, 16, 17, 16, 17, 17, 17, 17, 18, 17, 18, 18, 17, 18, 17, 19, 19, 17, 19, 18, 20, 18, 18, 19, 18, 19, 19, 18, 20, 19, 19, 21

Offset

1,1

Comments

Since A061373 is pseudo-logarithmic with A061373(m*n)=A061373(m)+A061373(n) for m,n>1, its prime basis is sufficient to define it.

Links

Table of n, a(n) for n=1..72.

Formula

a(n)=A061373(A000040(n)), where p(n)=A000040(n) lists the primes. If p(n)-1 is written as product p(i)^e_i, then a(n) = 1 + sum a(i)*e_i.

Crossrefs

Sequence in context: A269670 A333480 A036587 * A086142 A258334 A039249

Adjacent sequences: A075142 A075143 A075144 * A075146 A075147 A075148

Keyword

nonn

Author

Henry Bottomley, Sep 04 2002

Status

approved