Diagonal sums of triangle A188463.

Terms

a(0) =1a(1) =3a(2) =8a(3) =22a(4) =62a(5) =178a(6) =519a(7) =1533a(8) =4578a(9) =13800a(10) =41937a(11) =128345a(12) =395232a(13) =1223792a(14) =3807903a(15) =11900549a(16) =37339043a(17) =117574429a(18) =371429284a(19) =1176876762a(20) =3739129185a(21) =11909686261a(22) =38022182028a(23) =121648373964a(24) =389979453010