1,2

Row sums are A001414. This table is similar to A139547 and A120885. Cumulative column products are A003418, A139550, A139552, A139554.

Weisstein, Eric W., Mangoldt Function.

T(n,k) = if n>=k then A139547((A120885-1)) else 1.

1 = 1

2*1 = 2

3*1*1 = 3

2*2*1*1 = 4

5*1*1*1*1 = 5

1*3*2*1*1*1 = 6

7*1*1*1*1*1*1 = 7

2*2*1*2*1*1*1*1 = 8

3*1*3*1*1*1*1*1*1 = 9

1*5*1*1*2*1*1*1*1*1 = 10

11*1*1*1*1*1*1*1*1*1*1 = 11

1*1*2*3*1*2*1*1*1*1*1*1 = 12

13*1*1*1*1*1*1*1*1*1*1*1*1 = 13

(Excel cell formula) =if(mod(row(); column())=0; lookup(roundup((row()/column()); 0); A000027; A014963); 1)

Cf. A120885, A139547, A001414, A000027.

Sequence in context: A144869 A058564 A087157 this_sequence A140583 A123507 A122580

Adjacent sequences: A138615 A138616 A138617 this_sequence A138619 A138620 A138621

nonn,tabl

Mats O. Granvik (mgranvik(AT)abo.fi), May 14 2008