Number of vertices in an equal-armed cross with arms of length n (see Comments in A331456 for definition).

A333035

Number of vertices in an equal-armed cross with arms of length n (see Comments in A331456 for definition).

Terms

    a(0) =5a(1) =69a(2) =397a(3) =1417a(4) =3717a(5) =8009a(6) =15361a(7) =26777a(8) =43697a(9) =67597a(10) =100245a(11) =143177a(12) =199009a(13) =269197a(14) =356789a(15) =464577a(16) =595521a(17) =751129a(18) =935825a(19) =1151881a(20) =1403953a(21) =1695765a(22) =2031485a(23) =2413337a(24) =2848373a(25) =3337781a(26) =3888917a(27) =4505277a(28) =5191557a(29) =5952313

External references