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 A196154 Binomial transform of A004111. 4

%I

%S 0,1,3,7,16,38,95,250,689,1972,5809,17484,53497,165845,519681,1643112,

%T 5234728,16785774,54128870,175409177,570906174,1865364061,6116175260,

%U 20117351296,66361157675,219484396545,727692105683,2418048043653,8051628061939,26862111773042,89779489887570,300568375668272,1007841476081366

%N Binomial transform of A004111.

%H Alois P. Heinz, <a href="/A196154/b196154.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) ~ c * d^n / n^(3/2), where d = 1 + A246169 = 3.51754035263200389079535459..., c = 0.59875012586719098912050580024... - _Vaclav Kotesovec_, Oct 30 2017

%p with(numtheory):

%p b(d)*d*(-1)^(k/d+1), d=divisors(k)), k=1..n-1)/(n-1))

%p end:

%p a:= n-> add(b(k)*binomial(n, k), k=0..n):

%p seq(a(n), n=0..50); # _Alois P. Heinz_, Feb 24 2015

%t b[n_] := b[n] = If[n<2, n, Sum[b[n-k]*Sum[b[d]*d*(-1)^(k/d+1), {d, Divisors[k]}], {k, 1, n-1}]/(n-1)]; a[n_] := Sum[b[k]*Binomial[n, k], {k, 0, n}]; Table[a[n], {n, 0, 50}] (* _Jean-François Alcover_, Feb 12 2016, after _Alois P. Heinz_ *)

%Y Cf. A004111, A196161.

%K nonn

%O 0,3

%A _N. J. A. Sloane_, Oct 27 2011

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Last modified August 23 22:20 EDT 2019. Contains 326254 sequences. (Running on oeis4.)