A125700 Number of connected categories with n more morphisms than objects.

1, 3, 15, 77, 494, 4068

Offset

0,2

Links

Table of n, a(n) for n=0..5.

Eric Weisstein's World of Mathematics, Category

Formula

a(n) = Sum_{k=1..n+1} A125699(n+k,k).

Crossrefs

Cf. A125696, A125699, A125701.

Sequence in context: A074561 A026115 A027911 * A227954 A104530 A297952

Adjacent sequences: A125697 A125698 A125699 * A125701 A125702 A125703

Keyword

nonn,hard,more

Author

Franklin T. Adams-Watters and Christian G. Bower, Jan 05 2007

Extensions

a(4)-a(5) from Ben Spitz, Aug 30 2023

Status

approved