55599

Appears in sequences

• a(n) = a(n-1) + 2*a(floor(n/2)) if n > 0, otherwise 1.at n=39A058039
• Least k > 1 such that k^(3^n)*(k^(3^n)+1) + 1 is prime.at n=11A153438
• Numbers k with digits 5 and 9 only.at n=33A284382
• The successive remainders of the division by (a(n) + a(n+1)) of concat(a(n),a(n+1)) rebuild the sequence itself.at n=28A341037
• G.f. satisfies A(x) = 1 + x^4*A(x)^3 / (1 - x*A(x)).at n=23A365697