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A114478
Triangle read by rows; n-th row begins with n and contains n nonprimes greater than n and not already used.
0
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
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
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