Number of interior balls in a truncated octahedral arrangement.

Terms

a(0) =6a(1) =79a(2) =314a(3) =807a(4) =1654a(5) =2951a(6) =4794a(7) =7279a(8) =10502a(9) =14559a(10) =19546a(11) =25559a(12) =32694a(13) =41047a(14) =50714a(15) =61791a(16) =74374a(17) =88559a(18) =104442a(19) =122119a(20) =141686a(21) =163239a(22) =186874a(23) =212687a(24) =240774a(25) =271231a(26) =304154a(27) =339639a(28) =377782a(29) =418679