A032081 Shifts left under "BHJ" (reversible, identity, labeled) transform.

1, 1, 1, 4, 20, 220, 2020, 26310, 332410, 5189380, 83623310, 1551800020, 30389755640, 659473386920, 15190156196820, 379169061066320, 10036224774532890, 283940562045261940, 8488369128461080030

Offset

1,4

Links

Table of n, a(n) for n=1..19.

Crossrefs

Sequence in context: A215873 A066917 A280078 * A034235 A352412 A222655

Adjacent sequences: A032078 A032079 A032080 * A032082 A032083 A032084

Keyword

nonn,eigen

Author

Christian G. Bower

Status

approved