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A125700 Number of connected categories with n more morphisms than objects. 3
1, 3, 15, 77 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..3.

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: A019477 A019478 A151327 * A037766 A037654 A074561

Adjacent sequences:  A125697 A125698 A125699 * A125701 A125702 A125703

KEYWORD

bref,hard,more,nonn

AUTHOR

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

STATUS

approved

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Last modified February 27 10:25 EST 2021. Contains 341649 sequences. (Running on oeis4.)