a(n) is the smallest decimal palindrome with Hamming weight n (i.e., with exactly n 1's when written in binary).

A354480

a(n) is the smallest decimal palindrome with Hamming weight n (i.e., with exactly n 1's when written in binary).

Terms

    a(0) =0a(1) =1a(2) =3a(3) =7a(4) =77a(5) =55a(6) =111a(7) =191a(8) =383a(9) =767a(10) =5115a(11) =11711a(12) =15351a(13) =30703a(14) =81918a(15) =97279a(16) =744447a(17) =978879a(18) =1570751a(19) =3665663a(20) =8387838a(21) =66911966a(22) =66322366a(23) =132111231a(24) =199212991a(25) =389545983a(26) =939474939a(27) =3204444023a(28) =3220660223a(29) =11542724511

External references