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 A352438 Numbers k whose decimal expansion starts with the sum of the last two digits of k. 3
 10, 20, 30, 40, 50, 60, 70, 80, 90, 101, 110, 202, 211, 220, 303, 312, 321, 330, 404, 413, 422, 431, 440, 505, 514, 523, 532, 541, 550, 606, 615, 624, 633, 642, 651, 660, 707, 716, 725, 734, 743, 752, 761, 770, 808, 817, 826, 835, 844, 853, 862, 871, 880, 909, 918, 927, 936, 945, 954, 963, 972, 981, 990, 1001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..64. EXAMPLE 10 is a term because "10" starts with "1" = 1 + 0; 101 is a term because "101" starts with "1" = 0 + 1; 1019 is a term because "1019" starts with "10" = 1 + 9; etc. MATHEMATICA q[n_] := Module[{d = IntegerDigits[n], s, ds, nds}, s = Plus @@ d[[-2 ;; -1]]; ds = IntegerDigits[s]; nds = Length[ds]; ds == d[[1 ;; nds]]]; Select[Range[10, 1001], q] (* Amiram Eldar, Mar 16 2022 *) PROG (Python) def ok(n): s = str(n) return n > 9 and s.startswith(str(int(s[-2])+int(s[-1]))) print([k for k in range(1002) if ok(k)]) # Michael S. Branicky, Mar 16 2022 CROSSREFS Cf. A352439. Sequence in context: A273239 A343452 A043489 * A028440 A332046 A166511 Adjacent sequences: A352435 A352436 A352437 * A352439 A352440 A352441 KEYWORD base,nonn AUTHOR Eric Angelini and Carole Dubois, Mar 16 2022 STATUS approved

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Last modified December 8 16:32 EST 2023. Contains 367680 sequences. (Running on oeis4.)