login
Row sums of a number triangle related to the Pell numbers.
1

%I #3 Mar 30 2012 18:59:09

%S 1,3,15,109,1053,12711,184123,3111585,60096249,1305766603,31523994471,

%T 837162204693,24253060182805,761176868685039,25727009276451603,

%U 931657420717406281,35987519689305385713,1476986487871517622675

%N Row sums of a number triangle related to the Pell numbers.

%C Row sums of triangle A110327.

%F E.g.f.: exp(x)/(1-2x-x^2); a(n)=sum{k=0..n, n!*Pell(n-k+1)/k!}; a(n)=sum{k=0..n, binomial(n, k)*k!*Pell(k+1)}.

%Y Cf. A000129.

%K easy,nonn

%O 0,2

%A _Paul Barry_, Jul 20 2005