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A086637
Row sums of triangle
A086636
.
1
1, 2, 7, 35, 202, 1271, 8463, 58639, 418419, 3053702, 22687372, 171008336, 1304491048, 10051505234, 78117049696, 611612430537, 4819607926076, 38195797609995, 304234734698412
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OFFSET
0,2
COMMENTS
Triangle
A086636
relates Catalan numbers (
A000108
) to ternary trees (
A001764
).
LINKS
Table of n, a(n) for n=0..18.
FORMULA
G.f.: A(x) = (3-sqrt(1-4x))/2 + x*A(x)^3.
CROSSREFS
Cf.
A086636
.
Sequence in context:
A287327
A020066
A024719
*
A172511
A214461
A130458
Adjacent sequences:
A086634
A086635
A086636
*
A086638
A086639
A086640
KEYWORD
nonn
AUTHOR
Paul D. Hanna
, Jul 24 2003
STATUS
approved
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Last modified May 28 12:54 EDT 2024. Contains 372913 sequences. (Running on oeis4.)