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 A235640 Primes p of the form n^2 + 1234567890 where 1234567890 is the first pandigital number with digits in order. 4
 1234567891, 1234568059, 1234569571, 1234574779, 1234576171, 1234579771, 1234592539, 1234595779, 1234609099, 1234625011, 1234625971, 1234634971, 1234647979, 1234669651, 1234692499, 1234743451, 1234753651, 1234769491, 1234780411, 1234900819, 1234948579 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS K. D. Bajpai, Table of n, a(n) for n = 1..6694 EXAMPLE 1234567891 is a prime and appears in the sequence because 1234567891 = 1^2 + 1234567890. 1234568059 is a prime and appears in the sequence because 1234568059 = 13^2 + 1234567890. MAPLE KD := proc() local a; a:=n^2+1234567890; if isprime(a) then RETURN (a); fi; end: seq(KD(), n=1..2000); MATHEMATICA Select[Table[k^2+1234567890, {k, 1, 2000}], PrimeQ] c=0; a=n^2+1234567890; Do[If[PrimeQ[a], c=c+1; Print[c, " ", a]], {n, 0, 200000}] (*b-file*) CROSSREFS Cf. A000040, A002496, A028871, A050289, A056899, A240587, A234812. Sequence in context: A135605 A091416 A162324 * A104953 A225139 A176942 Adjacent sequences: A235637 A235638 A235639 * A235641 A235642 A235643 KEYWORD nonn AUTHOR K. D. Bajpai, Apr 20 2014 STATUS approved

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Last modified May 30 02:25 EDT 2023. Contains 363044 sequences. (Running on oeis4.)