A077159 Triangle in which n-th row contains smallest n numbers coprime to n which have not occurred earlier.

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

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