A321200 - OEIS

A321200

Alternating row sums of Riordan triangle A321198.

1, -1, 2, -4, 8, -18, 39, -89, 204, -472, 1110, -2616, 6231, -14909, 35861, -86705, 210364, -512480, 1252350, -3069638, 7544818, -18589202, 45907708, -113608590, 281698359, -699748003, 1741102844, -4338995332, 10828981851, -27063384783, 67722954114, -169674183372, 425590855116, -1068654838488

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OFFSET

0,3

COMMENTS

The row sums of triangle A321198 are given in A321199.

LINKS

Table of n, a(n) for n=0..33.

FORMULA

a(n) = Sum_{k=0..n} A321198(n, k), n >= 0.

G.f.: f(x)/(1 + x*f(x)), with f(x) = F^{[-1]}(x)/x = Sum_{n >= 0} (-1)^(n+1)*A001005(n)*x^n, where F^{[-1]}(x) is the compositional inverse of F(y) = y/(1 + y^2 - y^3) (see A077961 for F(y)/y).

CROSSREFS

Cf. A001005, A077961, A321198, A321199.

Sequence in context: A110110 A300221 A233437 * A056362 A086585 A329971

Adjacent sequences: A321197 A321198 A321199 * A321201 A321202 A321203

KEYWORD

sign,easy

AUTHOR

Wolfdieter Lang, Nov 12 2018

STATUS

approved