A114478 Triangle read by rows; n-th row begins with n and contains n nonprimes greater than n and not already used.

0, 1, 4, 2, 6, 8, 3, 9, 10, 12, 4, 14, 15, 16, 18, 5, 20, 21, 22, 24, 25, 6, 26, 27, 28, 30, 32, 33, 7, 34, 35, 36, 38, 39, 40, 42, 8, 44, 45, 46, 48, 49, 50, 51, 52, 9, 54, 55, 56, 57, 58, 60, 62, 63, 64, 10, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77

Offset

0,3

Links

Table of n, a(n) for n=0..65.

Example

Triangle begins:
  0;
  1,  4;
  2,  6,  8;
  3,  9, 10, 12;
  4, 14, 15, 16, 18;
  5, 20, 21, 22, 24, 25;

Crossrefs

Cf. A113167.

Sequence in context: A077157 A268718 A306874 * A367882 A330530 A302659

Adjacent sequences: A114475 A114476 A114477 * A114479 A114480 A114481

Keyword

nonn,tabl

Author

Parthasarathy Nambi, Feb 16 2006

Extensions

More terms from Sean A. Irvine, Sep 22 2011

a(0)=0 inserted by Michel Marcus, Feb 03 2023

Status

approved