A187043 Number of factors in expansion of infinitary perfect numbers (A007357) over distinct terms of A050376

2, 3, 3, 5, 6, 7, 7, 7, 8, 9, 8, 9, 9, 10, 10, 11, 11, 12, 13, 12, 13, 14, 14, 15, 16, 17, 18, 19, 19, 19, 20, 21, 21, 23, 22, 23

Offset

1,1

Comments

All terms beyond a(17) should be regarded conjectural, because they reach beyond the known terms in A007357. - R. J. Mathar, Mar 30 2011

Links

Table of n, a(n) for n=1..36.

Formula

a(n) = A064547(A007357(n)). - R. J. Mathar, Mar 30 2011

Example

Consider A007357(3)=90. It is a unique product 2*5*9 of distinct terms of A050376. Thus a(3)=3.

Crossrefs

Cf. A050376, A007357

Sequence in context: A115350 A320034 A262882 * A081211 A081213 A081210

Adjacent sequences: A187040 A187041 A187042 * A187044 A187045 A187046

Keyword

nonn

Author

Vladimir Shevelev, Mar 02 2011

Status

approved