Numbers k such that k + sigma(k) and k + phi(k) are palindromes.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =219a(6) =322a(7) =375a(8) =22248a(9) =32065a(10) =47827a(11) =1406744a(12) =2144055a(13) =2991368a(14) =3626587a(15) =4909369a(16) =172133971a(17) =177457001a(18) =328030055a(19) =3128669654a(20) =8345867631a(21) =19649249526a(22) =45179367929a(23) =47228405729a(24) =48534773039a(25) =49583585599