A090298 Permutation of natural numbers generated by 5-row array shown below.

1, 9, 2, 11, 8, 3, 19, 12, 7, 4, 21, 18, 13, 6, 5, 29, 22, 17, 14, 10, 31, 28, 23, 16, 15, 39, 32, 27, 24, 20, 41, 38, 33, 26, 25, 49, 42, 37, 34, 30, 51, 48, 43, 36, 35, 59, 52, 47, 44, 40, 61, 58, 53, 46, 45, 69, 62, 57, 54, 50, 71, 68, 63, 56, 55, 79, 72, 67, 64, 60, 81, 78

Offset: 1

Author

Giovanni Teofilatto, Jan 25 2004

Keywords

• easy
• nonn

Comments

1 9 11 19 21 29 31 39... (A090771)

2 8 12 18 22 28 32 38... (A090772)

3 7 13 17 23 27 33 37... (A063226)

4 6 14 16 24 26 34 36... (A090773)

5 10 15 20 25 30 35 40... (A008587, excluding initial term)

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For such arrays A_k, here A_5, see a W. Lang comment on A113807, the A_7 case. However, in order to obtain A_5 one should take the last row as the first one after adding a 0 in front (thus getting a permutation of the nonnegative integers). - Wolfdieter Lang, Feb 02 2012

Crossrefs

Cf. A088520, A090243, A092260, A113807.

Extensions

More terms from Ray Chandler, Feb 01 2004