EPISODE · Jun 16, 2025 · 10 MIN
OEIS A000250: Number of Symmetric Reflexive Relations on N Nodes
from Intellectually Curious · host Mike Breault
In this milestone Deep Dive, we tackle OEIS A000250: the count of symmetric reflexive relations on an N‑node set. We spell out what reflexive and symmetric mean in plain terms, why the naïve count 2^(N choose 2) isn’t correct, and how the actual enumeration uses deeper number‑theoretic tools—partitions of N and gcd‑type structure—along with the rich history and references in the OEIS entry. A clean example of how a simple graph‑like question opens up connections between combinatorics and number theory, with notes on history, definitions, and related sequences.Note: This podcast was AI-generated, and sometimes AI can make mistakes. Please double-check any critical information.Sponsored by Embersilk LLC
Embed this episode
What this episode covers
In this milestone Deep Dive, we tackle OEIS A000250: the count of symmetric reflexive relations on an N‑node set. We spell out what reflexive and symmetric mean in plain terms, why the naïve count 2^(N choose 2) isn’t correct, and how the actual enumeration uses deeper number‑theoretic tools—partitions of N and gcd‑type structure—along with the rich history and references in the OEIS entry. A clean example of how a simple graph‑like question opens up connections between combinatorics and numb...
NOW PLAYING
OEIS A000250: Number of Symmetric Reflexive Relations on N Nodes
No transcript for this episode yet
Similar Episodes
No similar episodes found.
Similar Podcasts
No similar podcasts found.