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Search: id:A026387
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A026387 a(n) = number of integer strings s(0),...,s(n) counted by array T in A026386 that have s(n)=0; also a(n) = T(2n,n). +0
4
2, 8, 34, 150, 678, 3116, 14494, 68032, 321590, 1528776, 7301142, 35003238, 168359754, 812041860, 3926147730, 19022666310, 92338836390, 448968093320, 2186194166950, 10659569748370, 52037098259090, 254308709196660 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Cf. A026378.

Sequence in context: A034999 A067336 A151829 this_sequence A085362 A150889 A150890

Adjacent sequences: A026384 A026385 A026386 this_sequence A026388 A026389 A026390

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.

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