Consider a non-palindromic number of k digits n = d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + … + d_(2)*10 + d_(1). Sequence lists the numbers n such that Sum_{i=1..k-1}{sigma(Sum_{j=1..i}{d_(j)*10^(j-1)})} = Sum_{i=1..k-1}{sigma(Sum_{j=1..i}{d_(k-j+1)*10^(i-j)})} (see example below).
A241502
Consider a non-palindromic number of k digits n = d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + … + d_(2)*10 + d_(1). Sequence lists the numbers n such that Sum_{i=1..k-1}{sigma(Sum_{j=1..i}{d_(j)*10^(j-1)})} = Sum_{i=1..k-1}{sigma(Sum_{j=1..i}{d_(k-j+1)*10^(i-j)})} (see example below).
Terms
- a(0) =324a(1) =648a(2) =756a(3) =4448a(4) =4961a(5) =4983a(6) =5849a(7) =11124a(8) =34453a(9) =37609a(10) =54575a(11) =97888a(12) =860858a(13) =1089693a(14) =3143632a(15) =3192897a(16) =3588047a(17) =3768167a(18) =5557853a(19) =25485909a(20) =32899939a(21) =35699309a(22) =58260393a(23) =64564422a(24) =120054389a(25) =121554165a(26) =356346023a(27) =357507563a(28) =755438130a(29) =990227314
External references
- oeis: A241502