18314708

Appears in sequences

• Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than n elements linked to themselves.at n=6A271609
• Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 6 elements linked to themselves.at n=6A271615
• Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 7 elements linked to themselves.at n=6A271616