A140224 Triangle: T(n,m) is number of m's among (d(1),d(2),...,d(n)), where d(n) = A000005(n).

1, 1, 1, 1, 2, 0, 1, 2, 1, 0, 1, 3, 1, 0, 0, 1, 3, 1, 1, 0, 0, 1, 4, 1, 1, 0, 0, 0, 1, 4, 1, 2, 0, 0, 0, 0, 1, 4, 2, 2, 0, 0, 0, 0, 0, 1, 4, 2, 3, 0, 0, 0, 0, 0, 0, 1, 5, 2, 3, 0, 0, 0, 0, 0, 0, 0, 1, 5, 2, 3, 0, 1, 0, 0, 0, 0, 0, 0, 1, 6, 2, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 6, 2, 4, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0

Offset

1,5

Links

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

Example

The sequence of the numbers of divisors of the first 12 positive integers is: 1,2,2,3,2,4,2,4,3,4,2,6.
There is one 1 in this list, five 2's, two 3's, three 4's, zero 5's, one 6 and zero of any other positive integer. So row 12 of the triangle is: 1,5,2,3,0,1,0,0,0,0,0,0.

Crossrefs

Cf. A000005, A140223, A140225.

Sequence in context: A322522 A168121 A158948 * A075993 A117170 A117466

Adjacent sequences: A140221 A140222 A140223 * A140225 A140226 A140227

Keyword

nonn,tabl

Author

Leroy Quet, May 12 2008

Extensions

Extended by Ray Chandler, Jun 26 2009

Status

approved