A032218 Number of dyslexic rooted compound windmills with n nodes where any 2 submills extending from the same node are different sizes.

1, 1, 1, 2, 3, 6, 12, 25, 51, 111, 244, 543, 1219, 2783, 6352, 14763, 34208, 80271, 188517, 446696, 1057534, 2527328, 6029096, 14488609, 34792504, 84059268, 202861050, 492369844, 1193743829, 2907834039, 7078295983, 17300759883, 42248522887, 103574837980

Offset

1,4

Links

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

Index entries for sequences related to mobiles

Formula

Shifts left under "DFK" (bracelet, size, unlabeled) transform.

Prog

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

Crossrefs

Sequence in context: A077903 A038086 A032305 * A005829 A038087 A116379

Adjacent sequences: A032215 A032216 A032217 * A032219 A032220 A032221

Keyword

nonn

Author

Christian G. Bower

Extensions

Terms a(32) and beyond from Andrew Howroyd, Sep 20 2018

Status

approved