23405

Appears in sequences

• a(n) = (6*n+1)*(6*n+5).at n=25A001513
• Cube root of A030683.at n=27A030684
• Base-2 digits of a(n) are, in order, the first n terms of the periodic sequence with initial period 1,0,1.at n=14A033120
• a(n) = n*(n+1)*(5*n+1)/6.at n=29A033994
• Integers k such that in the list of divisors of k (in base 6), each digit 0-5 appears equally often.at n=1A045815
• Numbers that are repdigits in base 8.at n=33A048333
• Sums of members of groups in A076062.at n=35A076060
• a(n) = (4*n+3)*(4*n+7).at n=37A085027
• a(n) = a(n-1) + 2^(A007494(n-1)).at n=9A113835
• Numbers whose base 8 or octal representation is 555555555......5.at n=5A125836
• Number of primitive multiplex juggling sequences of length n, base state <1,1> and hand capacity 2.at n=10A136776
• Second trisection of A061037.at n=50A142599
• Write n in binary n times and concatenate (see example). a(n) is the decimal equivalent.at n=4A162473
• Numbers having in binary representation exactly two ones in three consecutive digits.at n=25A173593
• Quintisection A061037(5*n-2).at n=31A174850
• Composite squarefree numbers n such that p(i)+5 divides n-5, where p(i) are the prime factors of n.at n=9A225715
• Palindromic numbers in bases 2 and 8 written in base 10.at n=51A259380
• Numbers k such that (rol(k) XOR ror(k)) = k, where rol = A006257 and ror = A038572 are rotations of binary digits by one place to the left and right, and XOR is the binary exclusive-or operator.at n=9A273050
• Decimal values of the antidiagonals of the Sierpinski carpet considered as binary numbers.at n=14A292689
• a(n) = n^4 - 3*n^3 + 9*n^2 - 7*n + 5 (n>=1).at n=12A304162