Row sums of triangle A137680.

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =23a(5) =56a(6) =132a(7) =316a(8) =752a(9) =1793a(10) =4272a(11) =10183a(12) =24266a(13) =57833a(14) =137828a(15) =328475a(16) =782827a(17) =1865651a(18) =4446255a(19) =10596406a(20) =25253567a(21) =60184809a(22) =143433647a(23) =341833954a(24) =814665553a(25) =1941527332a(26) =4627086990a(27) =11027366781a(28) =26280642313a(29) =62632555360