Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

1,2

Looking on the number of 1`s, 2`s,...k`s in this sequence we obtain the sequence (1,2,4,5,9,16,25,42,72,...). Lim_k-->oo [number of (k+1)`s / number of(k`s)] = sqrt(e).

Table of n, a(n) for n=1..105.

Cf. A000010

Sequence in context: A091194 A156079 A061555 * A071626 A182008 A106457

Adjacent sequences: A146320 A146321 A146322 * A146324 A146325 A146326

nonn

Ctibor O. Zizka, Oct 30 2008

approved