A127439 Triangle read by rows, in which row n consists of first n terms of A054541.

2, 2, 1, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 4, 2, 1, 2, 2, 4, 2, 2, 1, 2, 2, 4, 2, 4, 2, 1, 2, 2, 4, 2, 4, 2, 2, 1, 2, 2, 4, 2, 4, 2, 4, 2, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 2, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 6, 2, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 6, 4

Offset

1,1

Comments

Rows tend to A054541: (2, 1, 2, 2, 4, 2, 4, ...)

Links

Table of n, a(n) for n=1..91.

Example

prime(5) = 2 + 1 + 2 + 2 + 4 = 11.
From Omar E. Pol, Dec 23 2021: (Start)
Triangle begins:
  2;
  2, 1;
  2, 1, 2;
  2, 1, 2, 2;
  2, 1, 2, 2, 4;
  2, 1, 2, 2, 4, 2;
  2, 1, 2, 2, 4, 2, 4;
  2, 1, 2, 2, 4, 2, 4, 2;
  2, 1, 2, 2, 4, 2, 4, 2, 4;
  2, 1, 2, 2, 4, 2, 4, 2, 4, 6;
  2, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2;
  2, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 6;
  2, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 6, 4;
... (End)

Crossrefs

Row sums give A000040.

Cf. A054541, A001223.

Sequence in context: A082389 A246127 A119469 * A218775 A370558 A191971

Adjacent sequences: A127436 A127437 A127438 * A127440 A127441 A127442

Keyword

nonn,tabl,easy

Author

Gary W. Adamson, Jan 14 2007

Extensions

Edited by N. J. A. Sloane, Jan 27 2007

More terms from Omar E. Pol, Feb 21 2014

Status

approved