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A024951 a(n) = Sum_{i=1..floor((n+2)/4)} a(2i-1)*a(n-2i+1), with a(1)=a(2)=1 and a(3)=5. 1
1, 1, 5, 5, 5, 30, 55, 80, 230, 530, 1080, 2505, 5555, 15130, 34705, 80530, 197855, 511455, 1249430, 2966155, 7334380, 18923630, 46926130, 114708755, 287150005, 741017280, 1860971930, 4628582080, 11629943105, 30291303280, 76640090080, 192409197255 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..32.

CROSSREFS

Sequence in context: A262122 A216876 A019162 * A092519 A198585 A224093

Adjacent sequences:  A024948 A024949 A024950 * A024952 A024953 A024954

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Offset corrected and title improved by Sean A. Irvine, Jul 30 2019

STATUS

approved

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Last modified July 30 07:41 EDT 2021. Contains 346348 sequences. (Running on oeis4.)