a(0) = 1 by convention; for n>0, a(n) is the number of points in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter).
A331449
a(0) = 1 by convention; for n>0, a(n) is the number of points in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter).
Terms
- a(0) =1a(1) =5a(2) =37a(3) =257a(4) =817a(5) =2757a(6) =4825a(7) =12293a(8) =19241a(9) =33549a(10) =49577a(11) =87685a(12) =101981a(13) =178465a(14) =220113a(15) =286357a(16) =379097a(17) =551669a(18) =606241a(19) =880293a(20) =951445a(21) =1209049a(22) =1507521a(23) =1947877a(24) =2002669a(25) =2624409a(26) =3056093a(27) =3550425a(28) =3955049a(29) =5069037
External references
- oeis: A331449