A127467 Mobius transform of A127466.

1, 1, 2, 2, 0, 6, 2, 2, 0, 8, 4, 0, 0, 0, 20, 2, 4, 6, 0, 0, 12, 6, 0, 0, 0, 0, 0, 42, 4, 4, 0, 8, 0, 0, 0, 32, 6, 0, 12, 0, 0, 0, 0, 0, 54, 4, 8, 0, 0, 20, 0, 0, 0, 0, 40

Offset

1,3

Comments

Left column = phi(n), A000010; right border = n*phi(n), A002618; row sums = A007434, (Mobius transform of the squares).

Links

Table of n, a(n) for n=1..55.

Formula

Mobius transform of A127466; (A054525 * A127466 as infinite lower triangular matrices).

Example

First few rows of the triangle are:
1;
1, 2;
2, 0, 6;
2, 2, 0, 8;
4, 0, 0, 0, 20;
2, 4, 6, 0, 0, 12;
6, 0, 0, 0, 0, 0, 42;
4, 4, 0, 8, 0, 0, 0, 32;
...

Crossrefs

Cf. A127466, A002618, A000010, A054525, A007434.

Sequence in context: A157077 A185896 A076256 * A338001 A271708 A284983

Adjacent sequences: A127464 A127465 A127466 * A127468 A127469 A127470

Keyword

nonn,tabl

Author

Gary W. Adamson, Jan 15 2007

Status

approved