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Row sums of triangle A360173.
2

%I #11 Feb 01 2023 16:04:32

%S 0,1,3,6,16,36,73,156,324,677,1405,2864,5906,12058,24548,49928,101434,

%T 206173,417141,844256,1707622,3452998,6970196,14058528,28368774,

%U 57197983,115239846,232020596,467296470,940684267,1892396396,3805806218,7654402454,15391563411

%N Row sums of triangle A360173.

%H Alois P. Heinz, <a href="/A360229/b360229.txt">Table of n, a(n) for n = 0..800</a>

%p b:= proc(n) option remember; `if`(n=0, 1, (p->

%p add((t-> `if`(i<n, 0, t*x^(i-n))+t*x^(i+n))(

%p coeff(p, x, i)), i=0..degree(p)))(b(n-1)))

%p end:

%p a:= proc(n) option remember; (p->

%p add(i*coeff(p, x, i), i=0..degree(p)))(b(n))

%p end:

%p seq(a(n), n=0..35); # _Alois P. Heinz_, Jan 30 2023

%Y Cf. A141001, A141002, A360173.

%K nonn

%O 0,3

%A _John Tyler Rascoe_, Jan 30 2023