A048704 - OEIS

A048704

Base 4 palindromes of even length divided by 5. a(n) = A048703(n)/5.

0, 1, 2, 3, 13, 17, 21, 25, 26, 30, 34, 38, 39, 43, 47, 51, 205, 221, 237, 253, 257, 273, 289, 305, 309, 325, 341, 357, 361, 377, 393, 409, 410, 426, 442, 458, 462, 478, 494, 510, 514, 530, 546, 562, 566, 582, 598, 614, 615, 631, 647, 663, 667, 683, 699, 715, 719

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OFFSET

0,3

LINKS

Amiram Eldar, Table of n, a(n) for n = 0..10000

MATHEMATICA

q[n_] := EvenQ[IntegerLength[5*n, 4]] && PalindromeQ[IntegerDigits[5*n, 4]]; Select[Range[0, 1000], q] (* Amiram Eldar, May 27 2024 *)

CROSSREFS

Cf. A048702 (base 2 palindromes of even length divided by 3), A048703.

Sequence in context: A059456 A274589 A019394 * A045340 A038882 A019339

Adjacent sequences: A048701 A048702 A048703 * A048705 A048706 A048707

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Mar 07 1999

EXTENSIONS

More terms from Amiram Eldar, May 27 2024

STATUS

approved