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 A338827 For any number with decimal representation (d(1), d(2), ..., d(k)), the decimal representation of a(n) is (abs(d(1)-d(k)), abs(d(2)-d(k-1)), ..., abs(d(k)-d(1))). 2
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 11, 22, 33, 44, 55, 66, 77, 88, 22, 11, 0, 11, 22, 33, 44, 55, 66, 77, 33, 22, 11, 0, 11, 22, 33, 44, 55, 66, 44, 33, 22, 11, 0, 11, 22, 33, 44, 55, 55, 44, 33, 22, 11, 0, 11, 22, 33, 44, 66, 55, 44, 33, 22, 11, 0, 11, 22 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,11 COMMENTS Leading zeros are ignored. All terms belong to A061917. LINKS Rémy Sigrist, Table of n, a(n) for n = 0..10000 FORMULA a(n) = 0 iff n is a palindrome (A002113). a(n) = A330240(n, A004086(n)). EXAMPLE For n = 1021: - abs(1-1) = 0, - abs(0-2) = 2, - abs(2-0) = 2, - abs(1-1) = 0, - so a(1021) = 220. MAPLE a:= n-> (l-> (h-> add(h[j]*10^(j-1), j=1..nops(h)))([seq(     abs(l[i]-l[-i]), i=1..nops(l))]))(convert(n, base, 10)): seq(a(n), n=0..70);  # Alois P. Heinz, Nov 12 2020 PROG (PARI) a(n, base=10) = my (d=digits(n, base)); fromdigits(abs(d-Vecrev(d)), base) CROSSREFS Cf. A002113, A004086, A056965, A061917, A175919 (binary analog), A330240, A338828 (ternary analog). Sequence in context: A342123 A187553 A003621 * A055963 A127805 A256480 Adjacent sequences:  A338824 A338825 A338826 * A338828 A338829 A338830 KEYWORD nonn,base,look,easy AUTHOR Rémy Sigrist, Nov 11 2020 STATUS approved

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Last modified April 13 02:47 EDT 2021. Contains 342934 sequences. (Running on oeis4.)