A026400 For n >= 1, n n's take places at stage n: the first n takes the least untaken place (l.u.p.) and for 2<=k<=n, the k-th n takes the l.u.p. at least (k-1)*n places past the place of the first n.

1, 2, 3, 2, 4, 3, 5, 6, 3, 4, 7, 5, 4, 6, 8, 9, 4, 5, 7, 6, 10, 5, 8, 11, 7, 6, 5, 9, 12, 13, 8, 6, 7, 9, 10, 11, 14, 6, 7, 8, 10, 12, 9, 13, 15, 7, 8, 11, 16, 17, 10, 9, 7, 12, 8, 13, 11, 14, 18, 15, 9, 10, 8, 19, 12, 14, 16, 11, 13, 9, 8, 10, 17, 20, 15

Offset

1,2

Links

Table of n, a(n) for n=1..75.

Maple

A026400 := proc(nmax) local a, n, lup, k, p ; a := [1, seq(0, i=2..nmax)] ; n := 2 ; while 0 in a do lup := 1 ; while op(lup, a) <> 0 do lup := lup+1 ; od; a := subsop(lup=n, a) ; for k from 2 to n do p := lup+(k-1)*n ; while p <= nmax and op(p, a) <> 0 do p := p+1 ; od: if p <= nmax then a := subsop(p=n, a) ; else break ; fi ; od: n := n+1 ; end: RETURN(a) ; end: A026400(300) ; # R. J. Mathar, Nov 30 2008

Crossrefs

Sequence in context: A199474 A246694 A054384 * A026409 A336215 A243290

Adjacent sequences: A026397 A026398 A026399 * A026401 A026402 A026403

Keyword

nonn

Author

Clark Kimberling

Extensions

Formula in definition corrected by R. J. Mathar, Nov 30 2008

Status

approved