A077159 - OEIS

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A077159

Triangle in which n-th row contains smallest n numbers coprime to n which have not occurred earlier.

3

2, 1, 3, 4, 5, 7, 9, 11, 13, 15, 6, 8, 12, 14, 16, 17, 19, 23, 25, 29, 31, 10, 18, 20, 22, 24, 26, 27, 21, 33, 35, 37, 39, 41, 43, 45, 28, 32, 34, 38, 40, 44, 46, 47, 49, 51, 53, 57, 59, 61, 63, 67, 69, 71, 73, 30, 36, 42, 48, 50, 52, 54, 56, 58, 60, 62, 55, 65, 77, 79, 83, 85

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OFFSET

1,1

COMMENTS

A permutation of the natural numbers.

LINKS

Table of n, a(n) for n=1..72.

EXAMPLE

Triangle begins:

2

1 3

4 5 7

9 11 13 15

6 8 12 14 16

17 19 23 25 29 31

10 18 20 22 23 24 26

...

CROSSREFS

Cf. A077160, A077161, A077162.

Sequence in context: A277518 A277383 A353730 * A277677 A075379 A308000

Adjacent sequences: A077156 A077157 A077158 * A077160 A077161 A077162

KEYWORD

easy,nonn,tabl

AUTHOR

Amarnath Murthy, Oct 31 2002

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 20 2003

STATUS

approved