9170280

Appears in sequences

• Number of periodic palindromes using exactly six different symbols.at n=17A056492
• Number of primitive (period n) periodic palindromes using exactly six different symbols.at n=17A056502
• The triangle T_2(n, m), where T_2(n, m) is the number of surjective multi-valued functions from {1, 1, 2, 3, ..., n-1} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).at n=50A172106