A077167 -id:A077167 - cp's OEIS frontend

A077164 Triangle in which n-th row gives n numbers relatively prime to n and greater than all earlier terms in the triangle.

2, 3, 5, 7, 8, 10, 11, 13, 15, 17, 18, 19, 21, 22, 23, 25, 29, 31, 35, 37, 41, 43, 44, 45, 46, 47, 48, 50, 51, 53, 55, 57, 59, 61, 63, 65, 67, 68, 70, 71, 73, 74, 76, 77, 79, 81, 83, 87, 89, 91, 93, 97, 99, 101, 103, 104, 105, 106, 107, 108, 109, 111, 112, 113, 114, 115, 119

Offset: 1

Amarnath Murthy, Oct 31 2002

			Triangle begins
   2;
   3,  5;
   7,  8, 10;
  11, 13, 15, 17;
  18, 19, 21, 22, 23;
  ...

Cf. A077165, A077166, A077167.

b[1,1]:=2:r:=3:for n from 2 to 15 do for i from 1 to n do while(gcd(r,n)>1) do r:=r+1:od:b[i,n]:=r:r:=r+1:od:od:seq( seq(b[k,j],k=1..j),j=1..15); # Sascha Kurz, May 09 2004

a(n) = A071977(n) for n>1. - Georg Fischer, Oct 06 2018

Corrected and extended by Sascha Kurz, May 09 2004

A077165 Leading terms of rows in A077164.

Original entry on oeis.org

2, 3, 7, 11, 18, 25, 43, 51, 67, 81, 104, 119, 152, 167, 199, 227, 258, 277, 330, 351, 400, 437, 484, 509, 578, 609, 667, 709, 772, 803, 914, 947, 1010, 1065, 1136, 1187, 1292, 1331, 1411, 1477, 1574, 1619, 1764, 1809, 1906, 1989, 2084, 2135, 2276, 2333, 2458

Offset: 1

Amarnath Murthy, Oct 31 2002

nonn

Apart from the first term, identical to A071979. [From R. J. Mathar, Sep 20 2008]

Cf. A077164, A077166, A077167.

Corrected and extended by Sascha Kurz, May 09 2004

A077166 Final terms of rows in A077164.

Original entry on oeis.org

2, 5, 10, 17, 23, 41, 50, 65, 79, 103, 115, 151, 165, 197, 226, 257, 275, 329, 349, 399, 436, 483, 507, 577, 608, 665, 706, 771, 801, 913, 945, 1009, 1063, 1135, 1186, 1291, 1329, 1409, 1474, 1573, 1615, 1763, 1807, 1905, 1988, 2083, 2131, 2275, 2332, 2457

Offset: 1

Amarnath Murthy, Oct 31 2002

nonn

Apart from the first terms, identical to A071978. [From R. J. Mathar, Sep 20 2008]

Cf. A077164, A077165, A077167.

Corrected and extended by Sascha Kurz, May 09 2004

cp's OEIS Frontend

A077164 Triangle in which n-th row gives n numbers relatively prime to n and greater than all earlier terms in the triangle.

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A077165 Leading terms of rows in A077164.

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A077166 Final terms of rows in A077164.

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