n is equal to the number of 1's in all numbers <= n written in base 6.

A014890

n is equal to the number of 1's in all numbers <= n written in base 6.

Terms

    a(0) =1a(1) =421a(2) =422a(3) =423a(4) =424a(5) =425a(6) =426a(7) =432a(8) =433a(9) =1726a(10) =3888a(11) =3889a(12) =4309a(13) =4310a(14) =4311a(15) =4312a(16) =4313a(17) =4314a(18) =4320a(19) =4321a(20) =9330

External references