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 A333016 Smallest palindromic number >= 2^n. 2
 1, 2, 4, 8, 22, 33, 66, 131, 262, 515, 1111, 2112, 4114, 8228, 16461, 32823, 65556, 131131, 262262, 524425, 1049401, 2097902, 4194914, 8388838, 16777761, 33555533, 67111176, 134222431, 268444862, 536878635, 1073773701, 2147557412, 4294994924, 8589999858, 17179897171 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Chai Wah Wu, Table of n, a(n) for n = 0..3321 FORMULA a(n) = A262038(A000079(n)). - Michel Marcus, May 04 2020 EXAMPLE a(10) = 1111, because 2^10 = 1024 and 1111 is the smallest palindromic number >= 1024. MATHEMATICA spn[n_]:=Module[{k=2^n}, While[!PalindromeQ[k], k++]; k]; Array[spn, 40, 0] (* Harvey P. Dale, Jun 12 2023 *) PROG (PARI) a(n) = for(k=2^n, oo, if(Vecrev(v=digits(k))==v, return(k))); \\ Jinyuan Wang, Mar 05 2020 CROSSREFS Cf. A000079, A002113, A262038, A333770. Sequence in context: A262345 A192149 A115778 * A295628 A027713 A155765 Adjacent sequences: A333013 A333014 A333015 * A333017 A333018 A333019 KEYWORD nonn,base AUTHOR Eder Vanzei, Mar 05 2020 EXTENSIONS a(9) corrected by and more terms from Jinyuan Wang, Mar 05 2020 STATUS approved

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Last modified August 6 17:29 EDT 2024. Contains 374981 sequences. (Running on oeis4.)