a(n) is the smallest nonnegative integer m such that the integer part of tan(m) is equal to n.

Terms

a(0) =0a(1) =1a(2) =20a(3) =17a(4) =105a(5) =237a(6) =303a(7) =14a(8) =58a(9) =80a(10) =124a(11) =146a(12) =11151a(13) =168a(14) =46318a(15) =190a(16) =46695a(17) =212a(18) =23997a(19) =58432a(20) =234a(21) =13014a(22) =38574a(23) =61649a(24) =82949a(25) =256a(26) =16586a(27) =33271a(28) =48891a(29) =63091