Binomial transform of the tribonacci sequence A000073 (shifted left twice).

Terms

a(0) =1a(1) =2a(2) =5a(3) =14a(4) =40a(5) =114a(6) =324a(7) =920a(8) =2612a(9) =7416a(10) =21056a(11) =59784a(12) =169744a(13) =481952a(14) =1368400a(15) =3885280a(16) =11031424a(17) =31321376a(18) =88930368a(19) =252498816a(20) =716916544a(21) =2035531648a(22) =5779458048a(23) =16409538688a(24) =46591385856a(25) =132286304768a(26) =375598753024