A067326 - OEIS

A067326

Fifth column of triangle A067323.

14, 56, 202, 715, 2529, 8986, 32123, 115556, 418200, 1521976, 5567551, 20462525, 75528895, 279874350, 1040790135, 3883140600, 14531382060, 54529456320, 205146226200, 773608833894, 2923686178098, 11071970477876

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OFFSET

0,1

COMMENTS

Also fifth diagonal of triangle A028364.

LINKS

Table of n, a(n) for n=0..21.

FORMULA

a(n)= A067323(n+4, 4)= C(n+5)-sum(C(k)*C(n+4-k), k=0..3), C(n) := A000108(n) (Catalan).

G.f.: (c(x)^3)*(5+5*c(x)+3*c(x)^2+c(x)^3), with c(x) g.f. of A000108 (Catalan).

CROSSREFS

Cf. A067325 (fourth column).

Sequence in context: A115129 A281200 A212341 * A202242 A041374 A070741

Adjacent sequences: A067323 A067324 A067325 * A067327 A067328 A067329

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Feb 05 2002

STATUS

approved