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Search: id:A026650
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A026650 a(n) = T(2n,n-1), T given by A026648. +0
1
1, 6, 21, 108, 370, 1908, 6587, 34248, 119142, 623700, 2182818, 11487528, 40391988, 213451560, 753295635, 3993910416, 14136717574, 75152083716, 266650874678, 1420670333640, 5050926317724, 26960309526744, 96015725922014 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Adjacent sequences: A026647 A026648 A026649 this_sequence A026651 A026652 A026653

Sequence in context: A012418 A083558 A060843 this_sequence A009253 A012840 A013320

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified May 14 01:44 EDT 2008. Contains 139663 sequences.

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