A174130 List of numbers k such that k=6*r-1=m*q, m>=q and n>=g where m=6*n-1 or m=6*n+1 and q=6*g-1 or 6*g+1.

5, 35, 11, 65, 77, 143, 17, 95, 119, 209, 221, 323, 23, 125, 161, 275, 299, 425, 437, 575, 29, 155, 217, 341, 377, 527, 551, 713, 725, 999, 35, 185, 245, 407, 455, 529, 565, 851, 875, 1073, 1085, 1295, 41, 215, 287, 473, 533, 731, 779, 943, 1075, 1189

Offset: 1

Author

Juri-Stepan Gerasimov, Mar 09 2010

Keywords

• nonn

Comments

Alternating triangle A173865 read by odd rows. A173825 U A174130 = A173865.

Examples

			a(1)=5 because 5=6*1-1=(6*1-1)*(6*0+1); a(2)=35 because 35=6*6-1=(6*1-1)*(6*1+1); a(3)=11 because 11=6*2-1=(6*2-1)*(6*0+1).
		

Crossrefs

Cf. A173825, A173865.