a(n) is the smallest centered triangular number with exactly n prime factors (counted with multiplicity).

A358929

a(n) is the smallest centered triangular number with exactly n prime factors (counted with multiplicity).

Terms

    a(0) =1a(1) =19a(2) =4a(3) =316a(4) =136a(5) =760a(6) =64a(7) =4960a(8) =22144a(9) =103360a(10) =27136a(11) =5492224a(12) =1186816a(13) =41414656a(14) =271212544a(15) =559980544a(16) =1334788096a(17) =12943360a(18) =7032930304a(19) =527049293824a(20) =158186536960a(25) =56262393856

External references