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A098980 Duplicate of A007647. 0
1, 3, 9, 21, 363, 2161, 4839, 49521, 105994 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A259367 A193374 A191998 * A007647 A247182 A318807

Adjacent sequences:  A098977 A098978 A098979 * A098981 A098982 A098983

KEYWORD

dead

STATUS

approved

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Last modified July 7 11:47 EDT 2022. Contains 355148 sequences. (Running on oeis4.)