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A105849 Row sums of number triangle A105848. 2
1, 3, 9, 28, 91, 308, 1079, 3888, 14332, 53810, 205075, 791250, 3084504, 12129506, 48056095, 191633546, 768535768, 3097705378, 12541851048, 50983349848, 208003171266, 851412895348, 3495527318559, 14390543072502, 59393240482618 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Binomial transform of A105633.

LINKS

Table of n, a(n) for n=0..24.

FORMULA

G.f.: (1-2x-sqrt((1-6x+8x^2-4x^3)/(1-2x)))/(2x^2).

Conjecture: (n+2)*a(n) +2*(-4*n-3)*a(n-1) +4*(5*n-2)*a(n-2) +2*(-10*n+17)*a(n-3) +8*(n-3)*a(n-4)=0. - R. J. Mathar, Nov 16 2012

CROSSREFS

Sequence in context: A071756 A176673 A215007 * A243156 A228449 A131203

Adjacent sequences:  A105846 A105847 A105848 * A105850 A105851 A105852

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 22 2005

STATUS

approved

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Last modified July 5 21:00 EDT 2020. Contains 335473 sequences. (Running on oeis4.)