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A048609 Duplicate of A048603. 0
1, 12, 160, 40320, 71680, 1277337600, 79705866240, 167382319104000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..7.

S. Dulucq, Etude combinatoire de problèmes d'énumération, d'algorithmique sur les arbres et de codage par des mots, a thesis presented to l'Université de Bordeaux I, 1987. (Annotated scanned copy)

CROSSREFS

Cf. A048603.

Sequence in context: A019578 A144346 A167558 * A048603 A275040 A109391

Adjacent sequences:  A048606 A048607 A048608 * A048610 A048611 A048612

KEYWORD

dead

STATUS

approved

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Last modified January 18 10:53 EST 2019. Contains 319271 sequences. (Running on oeis4.)