1973790

Appears in sequences

• Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,2,0.at n=10A037709
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 17.at n=25A068038
• a(n+1) = 2*a(n) + A014017(n+5), a(0) = 0.at n=25A191497
• Numbers a(n) with property a(n) + a(n+4) = 2^(n+4) - 1 = A000225(n+4).at n=21A224520