68397

Appears in sequences

• a(n) = 2 + floor((1 + Sum_{j=1..n-1} a(j))/4).at n=47A120161
• 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, 1, -1), (-1, 1, 1), (1, -1, 0), (1, 1, 1)}.at n=9A149574
• a(n) has exactly (a(n) - n) / 2 partitions with exactly (a(n) - n) / 2 prime parts.at n=37A299732
• Left-truncatable happy numbers: every suffix is a happy number and no digits are zero.at n=30A383639