A032235 Number of dyslexic rooted compound windmills with n nodes where any 2 submills extending from the same node are different.

1, 1, 1, 2, 3, 6, 12, 25, 52, 113, 251, 560, 1268, 2896, 6680, 15527, 36301, 85364, 201747, 479040, 1141953, 2732737, 6560655, 15799567, 38154309, 92378578, 224192754, 545292987, 1328985026, 3245140686, 7938052589

Offset

1,4

Links

Andrew Howroyd, Table of n, a(n) for n = 1..200

C. G. Bower, Transforms (2)

Index entries for sequences related to mobiles

Formula

Shifts left under "DGK" (bracelet, element, unlabeled) transform.

Prog

(PARI)
DGK(v)={apply(p->subst(serlaplace(p/y + polcoeff(p, 1) + polcoeff(p, 2)), y, 1)/2, Vec(prod(k=1, #v, (1 + x^k*y + O(x*x^#v))^v[k])-1, -#v))}
seq(n)={my(v=[1]); for(i=2, n, v=concat([1], DGK(v))); v} \\ Andrew Howroyd, Sep 20 2018

Crossrefs

Sequence in context: A116379 A116380 A004111 * A192805 A162985 A052523

Adjacent sequences: A032232 A032233 A032234 * A032236 A032237 A032238

Keyword

nonn

Author

Christian G. Bower

Status

approved