47930

Appears in sequences

• Numbers n such that sigma(n)=2n-phi(phi(n)).at n=26A110073
• Number of distinct sums of reciprocals of parts of partitions of n.at n=47A212187
• Number of (n+1) X (1+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0001 0101 or 0111.at n=9A259290
• a(n) = a(n-1) + a(n-2) + a(n-3), with a(0) = 3, a(1) = 2, a(2) = 5.at n=17A274761
• Number of strings of length n composed of symbols from the circular list [1,2,3,4] such that adjacent symbols in the string must be adjacent in the list. No runs of length 2 or more are allowed for symbols 1 and 3.at n=11A277236