A237519 Triangle read by rows: T(n,k), n>=1, k>=1, in which column k lists the partial sums of the column k of A237273 starting in row k^2.

1, 4, 8, 13, 2, 19, 2, 26, 7, 34, 7, 43, 13, 53, 13, 3, 64, 20, 3, 76, 20, 3, 89, 28, 10, 103, 28, 10, 118, 37, 10, 134, 37, 18, 151, 47, 18, 4, 169, 47, 18, 4, 188, 58, 27, 4, 208, 58, 27, 4, 229, 70, 27, 13, 251, 70, 37, 13, 274, 83, 37, 13, 298, 83, 37, 13, 323, 97, 48, 23, 349, 97, 48, 23, 5

Offset: 1

Author

Omar E. Pol, Feb 08 2014

Keywords

• nonn
• tabf

Comments

The sum of row n is A024916(n), the sum of all divisors of all positive integers <= n.

Row n has length A000196(n).

Column 1 is A034856.

Column 2 lists the elements of A155212 repeated.

Column 3 lists the elements of A051938 repeated with three copies of every element.

Column k contains k copies of every element.

Examples

			Triangle begins:
1;
4;
8;
13,   2;
19,   2;
26,   7;
34,   7;
43,  13;
53,  13,  3;
64,  20,  3;
76,  20,  3;
89,  28, 10;
103, 28, 10;
118, 37, 10;
134, 37, 18;
151, 47, 18,  4;
169, 47, 18,  4;
188, 58, 27,  4;
208, 58, 27,  4;
229, 70, 27, 13;
251, 70, 37, 13;
274, 83, 37, 13;
298, 83, 37, 13;
323, 97, 48, 23;
349, 97, 48, 23,  5;
...
		

Crossrefs

Cf. A000203, A000196, A024916, A034856, A051938, A155212, A236104, A235791, A237273.