The added number in A370193 which results in the stack having a new record height.

Terms

a(0) =1a(1) =3a(2) =11a(3) =27a(4) =63a(5) =143a(6) =279a(7) =823a(8) =1447a(9) =3879a(10) =8007a(11) =19143a(12) =41927a(13) =67911a(14) =238151a(15) =425543a(16) =1084487a(17) =2242631a(18) =4281415a(19) =12072007a(20) =24044615a(21) =62338119a(22) =126624839a(23) =298558535a(24) =715744327a(25) =1211589703a(26) =3396002887