Information on mass chains and nuclides available on this website:

WWW TUNL

¹⁷C has been observed in the 5.5 GeV proton bombardment of uranium: it is particle stable (PO68B). Its atomic mass excess is calculated to be 21.27 MeV (transverse form of the mass equation): it is then stable with respect to decay into ¹⁶C + n by 0.50 MeV (TH74, JE75). The E_β^-(ma^Q) for the decay to ¹⁷N would then be 13.4 MeV. See also (71AJ02), (AR71, BU71E), (TO73G) and (TH72K, WI73J, BE75Q, WI75D; theor.).