A174852 Triangle T(n,k) read by rows. T(1,1)=1, n>1 T(n,1)=A049240, k>1 T(n,k)=A051731.

1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1

Offset

1,1

Comments

Except for the first term the first column is equal to A049240. The rest of the table equals A051731. The first column = 0 when n is a square greater than 1.

Links

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

Example

Table begins:
1,
1,1,
1,0,1,
0,1,0,1,
1,0,0,0,1,
1,1,1,0,0,1,
1,0,0,0,0,0,1,
1,1,0,1,0,0,0,1,
0,0,1,0,0,0,0,0,1,
1,1,0,0,1,0,0,0,0,1,

Crossrefs

Cf. A174854.

Sequence in context: A379968 A271047 A054525 * A341517 A065333 A244611

Adjacent sequences: A174849 A174850 A174851 * A174853 A174854 A174855

Keyword

nonn,tabl

Author

Mats Granvik, Mar 31 2010

Status

approved