31399

Appears in sequences

• Start of the first run of exactly n consecutive odd composite numbers.at n=34A075067
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0101 pattern in any orientation.at n=11A147179
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.at n=9A149005
• G.f.: Sum_{n>=0} Product_{k=1..n} Series_Reversion( x/(1 + x^k) ).at n=21A206290
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 609", based on the 5-celled von Neumann neighborhood.at n=31A273210
• 2nd term of the continued fraction for 2-sqrt(2)^^n, where x^^n denotes tetration.at n=26A280918
• Numbers k such that (56*10^k + 367)/9 is prime.at n=21A294231