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 A227410 Palindromic prime numbers representing a date in "condensed American notation" MMDDYY. 2
 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 30103, 30203, 30403, 30703, 30803, 31013, 31513, 32323, 32423, 70207, 70507, 70607, 71317, 71917, 72227, 72727, 73037, 90709, 91019 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS For February, the number of days will be 28 only, as the year cannot be a leap year if MMDDYY is to be a prime number. The sequence is finite, with 27 terms. The largest term is a(27)=91019. LINKS EXAMPLE a(1)=10301 is palindromic prime and represents a date in MMDDYY format as 010301. MATHEMATICA palindromicQ[n_] := TrueQ[IntegerDigits[n] == Reverse[IntegerDigits[n]]]; t = {}; Do[If[m < 8, If[OddQ[m], b = 31, If[m == 2, b = 28, b = 30]], If[OddQ[m], b = 30, b = 31]]; Do[a = 100 d + y + 10000 m; If[PrimeQ[a] && palindromicQ[a], AppendTo[t, a]], {d, 1, b}], {m, 1,    12}, {y, 1, 99}]; Union[t] CROSSREFS Cf. A213184, A227409, A227411. Sequence in context: A241788 A187937 A154089 * A227411 A100502 A099746 Adjacent sequences:  A227407 A227408 A227409 * A227411 A227412 A227413 KEYWORD nonn,base,fini,full,less AUTHOR Shyam Sunder Gupta, Sep 22 2013 STATUS approved

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Last modified September 26 06:16 EDT 2021. Contains 347664 sequences. (Running on oeis4.)