A179940 Number of times n appears in a 10 X 10 multiplication table.

1, 2, 2, 3, 2, 4, 2, 4, 3, 4, 0, 4, 0, 2, 2, 3, 0, 4, 0, 4, 2, 0, 0, 4, 1, 0, 2, 2, 0, 4, 0, 2, 0, 0, 2, 3, 0, 0, 0, 4, 0, 2, 0, 0, 2, 0, 0, 2, 1, 2, 0, 0, 0, 2, 0, 2, 0, 0, 0, 2, 0, 0, 2, 1, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1

Offset

1,2

Comments

Identical to A000005(n) for n <= 10.

Links

Table of n, a(n) for n=1..100.

Formula

a(n) = 0 for n > 100.

Example

a(2)=2 because the number 2 appears in 2 cells in a 10 X 10 multiplication table.

Mathematica

nn = 10; mtab = Flatten[Table[i*j, {i, nn}, {j, nn}]]; Table[Count[mtab, n], {n, 100}]

Crossrefs

First few terms are identical to A000005, A179941, A179942.

Sequence in context: A087990 A335037 A356069 * A138707 A358099 A095048

Adjacent sequences: A179937 A179938 A179939 * A179941 A179942 A179943

Keyword

nonn

Author

Dominick Cancilla, Aug 02 2010

Extensions

Extended by T. D. Noe, Mar 24 2011

Status

approved