The 3-D toothpick sequence A160160, but using toothpicks of length 4; a(n) is the number of nodes occupied after n steps.

A160430

The 3-D toothpick sequence A160160, but using toothpicks of length 4; a(n) is the number of nodes occupied after n steps.

Terms

    a(0) =0a(1) =5a(2) =13a(3) =29a(4) =57a(5) =85a(6) =113a(7) =145a(8) =209a(9) =329a(10) =509a(11) =613a(12) =665a(13) =697a(14) =761a(15) =881a(16) =1073a(17) =1273a(18) =1505a(19) =1817a(20) =2377a(21) =3217a(22) =4309a(23) =4761a(24) =4921a(25) =5009a(26) =5097a(27) =5233a(28) =5425a(29) =5625

External references