18534

Appears in sequences

• Number of inequivalent binary [ n,3 ] codes of dimension <= 3 without zero columns.at n=31A034337
• Let (u1,u2) be successive untouchable numbers such that phi(u1) = phi(u2); sequence gives values of u1.at n=38A048189
• a(n) is the number of subsequences {s(k)} of {1,2,3,...n} such that s(k+1)-s(k) is 1 or 3.at n=21A050228
• Numbers k such that numerator(Bernoulli(2*k)/(2*k)) is different from numerator(Bernoulli(2*k)/(2*k*(2*k-1))).at n=71A090495
• Numbers k such that k and 5*k, taken together, are pandigital.at n=9A115925
• Values of n such that n^a-+a are primes, a=7.at n=9A155022
• Number of (n+1) X 3 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly three clockwise edge increases.at n=3A206066
• Number of (n+1)X5 0..2 arrays with every 2X3 or 3X2 subblock having exactly three clockwise edge increases.at n=1A206068
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X3 or 3X2 subblock having exactly three clockwise edge increases.at n=11A206072
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X3 or 3X2 subblock having exactly three clockwise edge increases.at n=13A206072
• Numbers with arithmetic derivative which is a palindromic prime number (A002385).at n=27A359332