0,24

Row products give A139552.

Row products of the triangle are:

1 = 1

1*1 = 1

1*1*1 = 1

1*1*1*1 = 1

1*1*1*1*1 = 1

1*1*1*1*1*1 = 1

1*1*2*1*1*1*1 = 2

1*1*2*1*1*1*1*1 = 2

1*1*2*1*1*1*1*1*1 = 2

(Excel cell formula) =if(and(row()-1>=(column()-1)*3; row()-1<A014963(k-1)*(column()-1)*3); column()-1; 1)

Cf. A139552, A139547, A003418.

Sequence in context: A158854 A119849 A026492 this_sequence A022931 A043280 A030379

Adjacent sequences: A139548 A139549 A139550 this_sequence A139552 A139553 A139554

nonn,tabl

Mats O. Granvik (mgranvik(AT)abo.fi), Apr 27 2008