A030750 a(n)=least k such that s(k)=n, where s=A030747.

2, 4, 5, 1, 8, 12, 20, 17, 23, 34, 52, 31, 54, 40, 66, 81, 51, 139, 63, 115, 136, 78, 160, 137, 95, 159, 114, 183, 134, 245, 212, 156, 354, 243, 277, 182, 313, 353, 436, 211, 393, 350, 242, 391, 390, 275, 709, 536, 311, 434, 648, 349