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 A334417 a(n) is the palindrome equal to A334416(n) divided by its sum of digits. 1
 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 2, 7, 4, 3, 4, 7, 5, 4, 6, 7, 8, 9, 7, 55, 22, 11, 55, 22, 55, 22, 55, 55, 33, 55, 55, 55, 55, 44, 55, 55, 55, 55, 505, 88, 66, 202, 262, 77, 121, 88, 99, 181, 151, 121, 101, 88, 505, 424, 181, 121, 151, 181, 131, 343, 202, 181, 141 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,10 LINKS Table of n, a(n) for n=1..67. Index entries for sequences related to palindromes FORMULA a(n) = A334416(n) / A007953(A334416(n)). EXAMPLE A334416(10) = 12 whose sum of digits is 3; 12/3 = 4, so a(10) = 4. MATHEMATICA Select[#/Plus @@ IntegerDigits[#] & /@ Range[3000], PalindromeQ] (* Amiram Eldar, Apr 29 2020 *) PROG (PARI) isok(m) = iferr(my(d=digits(m/sumdigits(m))); d==Vecrev(d), E, 0); apply(x->x/sumdigits(x), select(x->isok(x), [1..3000])) \\ Michel Marcus, Apr 29 2020 CROSSREFS Cf. A007953, A113315, A334416. Cf. A334375 (similar for primes). Sequence in context: A329796 A002949 A197026 * A195779 A130849 A138754 Adjacent sequences: A334414 A334415 A334416 * A334418 A334419 A334420 KEYWORD nonn,base AUTHOR Bernard Schott, Apr 29 2020 STATUS approved

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Last modified April 20 11:40 EDT 2024. Contains 371838 sequences. (Running on oeis4.)