A195902 - OEIS

%I #22 Mar 29 2018 12:05:38

%S 1,189949981,3031430341303,1139781083801879311,1414082803082804141,

%T 1444271276721724441,1966548318138456691,3457863858583687543,

%U 3516331046401336153,193361787181787163391,3876643622232322263466783

%N Palindromic centered 22-gonal numbers.

%C a(12) > 10^26. - _Donovan Johnson_, Sep 27 2011

%H Terry Trotter, <a href="http://trottermath.net/polygonal-numbers/">Polygonal numbers</a>  [Warning: As of March 2018 this site appears to have been hacked. Proceed with great caution. The original content should be retrieved from the Wayback machine and added here. - _N. J. A. Sloane_, Mar 29 2018]

%F a(n) = A069173(A196494(n)).

%K nonn,base

%O 1,2

%A _Kausthub Gudipati_, Sep 25 2011

%E a(8)-a(10) from _Giovanni Resta_, Sep 26 2011

%E a(11) from _Donovan Johnson_, Sep 27 2011