A134464 (A127648 * A000012 + A000012 * A127773) - A000012.

1, 2, 4, 3, 5, 8, 4, 6, 9, 13, 5, 7, 10, 14, 19, 6, 8, 11, 15, 20, 26, 7, 9, 12, 16, 21, 27, 34, 8, 10, 13, 17, 22, 28, 35, 43, 9, 11, 14, 18, 23, 29, 36, 44, 53, 10, 12, 15, 19, 24, 30, 37, 45, 54, 64

Offset: 1

Author

Gary W. Adamson, Oct 26 2007

Keywords

• nonn
• tabl

Comments

Row sums = A134465: (1, 6, 16, 32, 55, 86, ...).

Examples

			First few rows of the triangle:
  1;
  2,  4;
  3,  5,  8;
  4,  6,  9, 13;
  5,  7, 10, 14, 19;
  6,  8, 11, 15, 20, 26;
  7,  9, 12, 16, 21, 27, 34;
  ...
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A127648, A127773, A134465.

Programs

Mathematica

Flatten[Table[RecurrenceTable[{a[1]==i,a[n]==a[n-1]+n},a,{n,i}],{i,10}]] (* Harvey P. Dale, Nov 12 2013 *)

Formula

(A127648 * A000012 * A000012 * A127773) - A000012, as infinite lower triangular matrices.