A032273 Shifts left 2 places under "DIJ" (bracelet, indistinct, labeled) transform.

1, 1, 1, 2, 5, 18, 92, 628, 5338, 53927, 627608, 8245257, 120542045, 1939926385, 34071346198, 648413562908, 13291025909948, 291921277586304, 6839533725684092, 170267930301293824, 4488220562839214752, 124883326887085347926, 3657771136861125837350

Offset

1,4

Links

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

Prog

(PARI) DIJ(p)={(p + p^2/2 - log(1-p))/2}
seq(n)={my(p=x+O(x*x^(n%2))); for(i=1, n\2, p=intformal(1 + intformal(1 + DIJ(p)))); Vec(serlaplace(p))} \\ Andrew Howroyd, Sep 19 2018

Crossrefs

Sequence in context: A099556 A057864 A320154 * A143522 A217389 A123310

Adjacent sequences: A032270 A032271 A032272 * A032274 A032275 A032276

Keyword

nonn,eigen

Author

Christian G. Bower

Extensions

Terms a(21) and beyond from Andrew Howroyd, Sep 19 2018

Status

approved