A358207 Numbers k such that k^2 + 2 is a palindrome.

0, 1, 2, 3, 8, 13, 19, 85, 258, 393, 828, 1811, 2538, 2916, 2986, 3627, 4540, 10503, 140833, 268865, 298436, 423437, 902696, 1050503, 1845571, 2491032, 5513951, 14365940, 25809892, 26237622, 28559254, 61875091, 79094282, 186062629, 246553448, 451977320, 452357920, 620208559, 813448358, 849937635

Offset

1,3

Links

Table of n, a(n) for n=1..40.

Prog

(PARI) isok(k) = my(d=digits(k^2+2)); d == Vecrev(d); \\ Michel Marcus, Nov 04 2022

Crossrefs

Cf. A358237, A059100, A027719, A002778, A070253.

Sequence in context: A193882 A168343 A217330 * A236169 A080478 A002053

Adjacent sequences: A358204 A358205 A358206 * A358208 A358209 A358210

Keyword

nonn,base

Author

Robert Xiao, Nov 04 2022

Status

approved