A090243 Permutation of natural numbers generated by 4-rowed array shown below.

1, 7, 2, 11, 6, 3, 13, 10, 5, 4, 19, 14, 9, 8, 23, 18, 15, 12, 25, 22, 17, 16, 31, 26, 21, 20, 35, 30, 27, 24, 37, 34, 29, 28, 43, 38, 33, 32, 47, 42, 39, 36, 49, 46, 41, 40, 55, 50, 45, 44, 59, 54, 51, 48, 61, 58, 53, 52, 67, 62, 57, 56, 71, 66, 63, 60, 73, 70, 65, 64, 79, 74

Offset: 1

Author

Giovanni Teofilatto, Jan 24 2004

Keywords

• easy
• nonn

Comments

1 7 11 13 19 23 25 31 35 37 43 47 ...

2 6 10 14 18 22 26 30 34 38 42 46 ...

3 5 9 15 17 21 27 29 33 39 41 45 ...

4 8 12 16 20 24 28 32 36 40 44 48 ...

References

• M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
• Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997

Crossrefs

Cf. A088520, A090298, A092260, A113807.

Extensions

Corrected and extended by Ray Chandler, Jan 30 2004