A032236 Number of dyslexic rooted compound windmills with n nodes and leaves of 2 colors where any 2 submills extending from the same node are different.

2, 2, 3, 7, 16, 41, 112, 318, 922, 2763, 8394, 25957, 81172, 256820, 819114, 2633626, 8525056, 27755962, 90841159, 298680608, 986156342, 3268174479, 10867702340, 36250205100, 121257882210, 406663900459, 1367092812987

Offset

1,1

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=[2]); for(i=2, n, v=concat([2], DGK(v))); v} \\ Andrew Howroyd, Sep 20 2018

Crossrefs

Sequence in context: A002848 A032257 A038075 * A128776 A117387 A113842

Adjacent sequences: A032233 A032234 A032235 * A032237 A032238 A032239

Keyword

nonn

Author

Christian G. Bower

Status

approved