0,5

Conjecture 1: a(n) - a(n-1) = 0 or 1.

Conjecture 2: lim_{n->infinity} a(n)/n = e/10.

Paolo P. Lava, Table of n, a(n) for n = 0..10000

A171481 := proc(n) option remember; if n = 0 then 0; elif n <=2 then 1; else procname(procname(n-1)) +procname(n-procname(n-1)-2) ; end if; end proc: seq(A171481(n), n=0..100) ; # R. J. Mathar, Mar 16 2010

Hofstadter-Conway-like sequence (see A004001).

Sequence in context: A289133 A135297 A176146 * A230775 A108037 A237354

Adjacent sequences: A171478 A171479 A171480 * A171482 A171483 A171484

nonn

Jaroslav Krizek, Dec 09 2009

More terms from R. J. Mathar, Mar 16 2010

approved