66833
domain: N
Appears in sequences
- Numbers k such that k and k^2 use only the digits 3, 4, 6, 8 and 9.at n=17A137129
- Number of partitions of (2, n) into a sum of distinct pairs.at n=44A268345
- G.f.: Product_{m>0} (1 + x^m + 2*x^(2*m) + 3*x^(3*m)).at n=39A290269
- a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = 0, a(1) = 0, a(2) = -1, a(3) = 1.at n=26A295725