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 A116032 Numbers k such that k + sigma(k) + phi(k) is a palindrome. 1
 1, 2, 3, 11, 12, 14, 16, 32, 33, 37, 47, 76, 101, 108, 126, 131, 134, 144, 168, 188, 216, 218, 235, 239, 248, 250, 265, 285, 289, 309, 313, 319, 325, 329, 507, 553, 578, 612, 624, 716, 963, 1037, 1058, 1147, 1257, 1406, 1851, 1887, 1948, 1961, 2038, 2196 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 EXAMPLE 1037 + sigma(1037) + phi(1037) = 3113. MAPLE ispali:= proc(n) local L, i; L:= convert(n, base, 10); andmap(t -> L[t] = L[-t], [\$1..nops(L)/2]); end proc: select(n -> ispali(n + numtheory:-sigma(n) + numtheory:-phi(n)), [\$1..10000]); # Robert Israel, Dec 20 2023 CROSSREFS Sequence in context: A035122 A085305 A189818 * A116029 A060812 A212129 Adjacent sequences: A116029 A116030 A116031 * A116033 A116034 A116035 KEYWORD nonn,base AUTHOR Giovanni Resta, Feb 13 2006 STATUS approved

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Last modified September 10 03:08 EDT 2024. Contains 375770 sequences. (Running on oeis4.)