31903

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 17 ones.at n=36A031785
• 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, 0), (-1, 0, 0), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.at n=10A148453
• a(n) is the smallest positive multiple of 2n-1 that contains the binary representation of n in its binary representation and that is a palindrome when written in binary.at n=30A158789
• Numbers n such that 3^(n - 3) is congruent to 1 modulo n.at n=2A242865
• a(n) = Sum_{k=0..n} (-1)^k * 2^k * p(k), where p(k) is the partition function A000041.at n=10A293464
• Expansion of Product_{k>=1} (1 + Lucas(k)*x^k).at n=15A318263