a(n) is the smallest integer k of the form k = x*(x + a(n-1)), such that A324920(k) = n, for some positive integer x, with a(0) = 0.

A307034

a(n) is the smallest integer k of the form k = x*(x + a(n-1)), such that A324920(k) = n, for some positive integer x, with a(0) = 0.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =3a(4) =10a(5) =11a(6) =26a(7) =87a(8) =178a(9) =179a(10) =362a(11) =1835a(12) =22164a(13) =155197a(14) =620804a(15) =5587317a(16) =55873270a(17) =167619819a(18) =1340958616a(19) =57661222337a(20) =345967334058

External references