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

1,2

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

Links

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

Crossrefs

Cf. A088520, A090298, A092260, A113807.

Sequence in context: A364899 A248283 A147677 * A216150 A145338 A104586

Adjacent sequences: A090240 A090241 A090242 * A090244 A090245 A090246

Keyword

easy,nonn

Author

Giovanni Teofilatto, Jan 24 2004

Extensions

Corrected and extended by Ray Chandler, Jan 30 2004

Status

approved