2228223

Appears in sequences

• Woodall (or Riesel) numbers: n*2^n - 1.at n=16A003261
• a(n) = (2n+1)*2^(2n+1) - 1.at n=8A098713
• p*2^p - 1 where p is prime.at n=6A099051
• a(n) = 17*2^n - 1.at n=17A198275
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 441", based on the 5-celled von Neumann neighborhood.at n=23A288331
• Irregular triangle read by rows, where the n-th row gives the number of steps in the hydra game when the initial hydra is each of the A000108(n) ordered trees with n edges (ordered by lexicographic order of their corresponding Dyck words as in A063171) and new heads are grown to the right.at n=50A372592