176128

Appears in sequences

• Number of labeled rooted trees of subsets of an n-set.at n=5A005172
• a(n) = A004017(n)/2.at n=27A045825
• Noninvertible 3 X 3 matrices over Z_n.at n=3A065499
• a(n) = (3*n-2)*2^(n-3).at n=13A066373
• Number of noninvertible n X n matrices mod 4 (i.e., over the ring Z_4).at n=2A069580
• 8th binomial transform of (1,7,0,0,0,0,0,...).at n=5A081043
• Expansion of x/((1+4x)(1-8x)).at n=7A091904
• Number of ordered finite sequences a_1 <= a_2 <= ... <= a_n of length n of positive integers less than or equal to n whose product is n! and whose sum is n * (n + 1) / 2.at n=25A119551
• Numbers with 26 divisors.at n=12A137489
• Triangle read by rows in which row n lists n+1 terms, starting with n^5 and ending with n^6, such that the difference between successive terms is equal to n^5 - n^4.at n=41A163285
• Totally multiplicative sequence with a(p) = 9p-2 for prime p.at n=39A166672
• Number of non-degenerate fanout-free Boolean functions of n variables having AND rank 1.at n=5A225170
• Triangle read by rows: T(n,k), 1 <= k <= n, is the number of non-degenerate fanout-free Boolean functions of n variables having AND rank k.at n=15A225171
• a(n) = 2^(n-2) * prime(n).at n=13A239885
• Consider the Post tag system defined in A284116; a(n) = number of binary words of length n which terminate at the empty word.at n=18A289670
• a(n) = A341886(n)/2; numbers k such that A307437(k) is even.at n=32A341887
• Lexicographically earliest sequence of distinct numbers such that every sum of consecutive terms is an evil number (A001969).at n=45A357989
• Numbers k such that k divides A243071(k).at n=46A364497
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} gcd(x_1, x_2, x_3, n)^3.at n=31A372928
• Positions of records in A375202.at n=26A375203