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A108532 Number of asymmetric mobiles (cycle rooted trees) with n nodes and 2-colored internal (non-leaf) nodes. 2
1, 2, 4, 12, 38, 136, 490, 1852, 7108, 27880, 110892, 447060, 1821252, 7489732, 31045350, 129587996, 544228664, 2298008824, 9750218012, 41548438040, 177740526076, 763046178960, 3286318131646, 14195239150556, 61481540391722 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Index entries for sequences related to mobiles

C. G. Bower, Transforms (2)

FORMULA

Shifts left and halves under CHK transform.

CROSSREFS

Cf. A032171, A108530, A108531.

Sequence in context: A149844 A149845 A149846 * A180487 A000940 A008404

Adjacent sequences:  A108529 A108530 A108531 * A108533 A108534 A108535

KEYWORD

nonn,eigen

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jun 07 2005

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Last modified February 15 10:28 EST 2012. Contains 205763 sequences.