Images of centered hexamorphic numbers: suppose k-th centered hexagonal number H_c(k) (A003215) ends in k; sequence gives value of H_c(k).

A060201

Images of centered hexamorphic numbers: suppose k-th centered hexagonal number H_c(k) (A003215) ends in k; sequence gives value of H_c(k).

Terms

    a(0) =1a(1) =127a(2) =817a(3) =7651a(4) =13267a(5) =83167a(6) =188251a(7) =520417a(8) =751501a(9) =1332667a(10) =1689751a(11) =2519917a(12) =4691251a(13) =8331667a(14) =75015001a(15) =88015417a(16) =117206251a(17) =133326667a(18) =325510417a(19) =833316667a(20) =7500150001a(21) =9492356251a(22) =10950460417

External references