Index of the smallest n-digit palindromic triangular number, or 0 if no such number exists.

A068642

Index of the smallest n-digit palindromic triangular number, or 0 if no such number exists.

Terms

    a(0) =1a(1) =10a(2) =18a(3) =77a(4) =173a(5) =1111a(6) =1593a(7) =8382a(8) =18906a(9) =50281a(10) =167053a(11) =0a(12) =1620621a(13) =6307938a(14) =15126258a(15) =50008881a(16) =149142458a(17) =846122222a(18) =2480116437a(19) =5513600773a(20) =14667896198a(21) =49786655918a(22) =246644446642a(23) =529670494286

External references