A195902 Palindromic centered 22-gonal numbers.

1, 189949981, 3031430341303, 1139781083801879311, 1414082803082804141, 1444271276721724441, 1966548318138456691, 3457863858583687543, 3516331046401336153, 193361787181787163391, 3876643622232322263466783

Offset: 1

Author

Kausthub Gudipati, Sep 25 2011

Keywords

• nonn
• base

Comments

a(12) > 10^26. - Donovan Johnson, Sep 27 2011

Links

• Terry Trotter, Polygonal numbers

Formula

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

Extensions

a(8)-a(10) from Giovanni Resta, Sep 26 2011

a(11) from Donovan Johnson, Sep 27 2011