70127

Appears in sequences

• 4th power of the lower triangular normalized 2nd kind Stirling matrix.at n=7A027497
• Third diagonal of A027497.at n=1A027506
• Second column of A027497.at n=2A027514
• Binomial transform of [1, 4, 6, 4, 1, 1, -1, 1, -1, 1, ...].at n=30A140227
• Number of obtuse triangles, distinct up to congruence, on an n X n grid (or geoboard).at n=27A190022
• Numbers k such that abs(A328258(k)) = abs(A328258(k+1)).at n=38A348586