Hypercomma numbers: n occurs in the sequence S[k+1]=S[k]+10*last_digit(S[k-1])+first_digit(S[k]) for each "legal" splitting n=concat(S[0],S[1]).

A166508

Hypercomma numbers: n occurs in the sequence S[k+1]=S[k]+10*last_digit(S[k-1])+first_digit(S[k]) for each "legal" splitting n=concat(S[0],S[1]).

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =10a(10) =20a(11) =30a(12) =40a(13) =50a(14) =60a(15) =70a(16) =80a(17) =90a(18) =109a(19) =806a(20) =1023a(21) =1044a(22) =2005a(23) =2676a(24) =3066a(25) =3602a(26) =4051a(27) =6053a(28) =6246a(29) =8011

External references