1,2

Lexicographically earliest permutation of the natural numbers with the defining property; inverse: A167902; A167901(n) = a(a(n)). [Reinhard Zumkeller, Nov 15 2009]

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

Index entries for sequences that are permutations of the natural numbers [Reinhard Zumkeller, Nov 15 2009]

(PARI) v=[1]; n=1; while(n<100, if(!issquarefree(v[#v]+n)&&!vecsearch(vecsort(v), n), v=concat(v, n); n=0); n++); v \\ Derek Orr, Jun 08 2015

Cf. A075381.

Cf. A167903, A121878. [Reinhard Zumkeller, Nov 15 2009]

Sequence in context: A210195 A069918 A200700 * A248497 A255439 A177983

Adjacent sequences: A075377 A075378 A075379 * A075381 A075382 A075383

nonn

Amarnath Murthy, Sep 22 2002

More terms from David Wasserman, Jan 17 2005

approved