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A132082
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Triangle read by rows: row n contains the n smallest positive integers which are coprime to (2^n +1).
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1
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1, 1, 2, 1, 2, 4, 1, 2, 3, 4, 1, 2, 4, 5, 7, 1, 2, 3, 4, 6, 7, 1, 2, 4, 5, 7, 8, 10, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 4, 5, 7, 8, 10, 11, 13, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
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OFFSET
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1,3
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LINKS
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EXAMPLE
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2^6 + 1 = 65. So row 6 contains the 6 smallest positive integers which are coprime to 65: (1,2,3,4,6,7).
1;
1, 2;
1, 2, 4;
1, 2, 3, 4;
1, 2, 4, 5, 7;
1, 2, 3, 4, 6, 7;
1, 2, 4, 5, 7, 8,10;
1, 2, 3, 4, 5, 6, 7, 8;
1, 2, 4, 5, 7, 8,10,11,13;
1, 2, 3, 4, 6, 7, 8, 9,11,12;
1, 2, 4, 5, 7, 8,10,11,13,14,16;
1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12;
1, 2, 4, 5, 7, 8,10,11,13,14,16,17,19;
1, 2, 3, 4, 6, 7, 8, 9,11,12,13,14,16,17;
1, 2, 4, 5, 7, 8,10,13,14,16,17,19,20,23,25; # R. J. Mathar, Feb 27 2018
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PROG
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(PARI) tabl(nn) = {for (n = 1, nn, m = 2^n+1; i = 1; nb = 0; while (nb != n, if (gcd(i, m) == 1, print1(i, ", "); nb++; ); i++); ); } \\ Michel Marcus, Feb 12 2014
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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