The area of the n-th convex honeycomb formed by spirals of incrementing strips of hexagons.

Terms

a(0) =1a(1) =3a(2) =10a(3) =21a(4) =91a(5) =120a(6) =300a(7) =990a(8) =2080a(9) =8911a(10) =11781a(11) =29403a(12) =97020a(13) =203841a(14) =873181a(15) =1154440a(16) =2881200a(17) =9506980a(18) =19974360a(19) =85562821a(20) =113123361a(21) =282328203a(22) =931587030a(23) =1957283461a(24) =8384283271a(25) =11084934960a(26) =27665282700a(27) =91286021970a(28) =191793804840a(29) =821574197731