Erroneous version of A001157.

Terms

a(0) =1a(1) =5a(2) =10a(3) =21a(4) =26a(5) =53a(6) =50a(7) =85a(8) =91a(9) =130a(10) =122a(11) =210a(12) =170a(13) =250a(14) =260a(15) =341a(16) =290a(17) =455