47364

Appears in sequences

• Number of primitive (period n) step cyclic shifted sequence structures using a maximum of two different symbols.at n=23A056439
• Number of primitive (period n) step cyclic shifted sequence structures using exactly two different symbols.at n=23A056444
• Numbers k such that 11*10^k - 1 is prime.at n=18A111391
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01110-11111 pattern in any orientation.at n=12A147363
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 593", based on the 5-celled von Neumann neighborhood.at n=7A273120
• a(n) = Sum_{k=0..n} k! * Sum_{d|n} phi(d) * A008284(n/d, k).at n=8A327025