Binomial transform of Euler's totient function phi(n+1).

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =29a(5) =68a(6) =155a(7) =348a(8) =775a(9) =1712a(10) =3745a(11) =8112a(12) =17431a(13) =37252a(14) =79355a(15) =168710a(16) =358037a(17) =758020a(18) =1599675a(19) =3362876a(20) =7041593a(21) =14692956a(22) =30577435a(23) =63531092a(24) =131901879a(25) =273804738a(26) =568366037a(27) =1179585610a(28) =2446603047a(29) =5068970880