A031921 -id:A031921 - cp's OEIS frontend

A118509 First differences of A031921.

682, 764, 754, 830, 838, 870, 854, 864, 922, 912, 902, 924, 1000, 896, 946, 1020, 882, 980, 1008, 924, 1110, 934, 1026, 924, 1014, 960, 1110, 1008, 1050, 1050, 944, 1116, 1042, 1008, 1004, 1036, 1110, 1022, 1032, 1108, 1050, 1110, 992, 978, 1150, 1106

Offset: 1

Lekraj Beedassy, May 06 2006

nonn

K. D. Bajpai, Table of n, a(n) for n = 1..10000

A118509:= proc() local a,b,k; a:=ithprime(n*100); b:=ithprime((n+1)*100);k:=b-a;RETURN (k);  end: seq(A118509 (), n=1..100); # K. D. Bajpai, Jun 19 2014

More terms from Joshua Zucker, May 11 2006

A246929 a(n) = prime(11*n).

Original entry on oeis.org

31, 79, 137, 193, 257, 317, 389, 457, 523, 601, 661, 743, 823, 887, 977, 1049, 1117, 1213, 1289, 1373, 1453, 1531, 1607, 1693, 1777, 1871, 1951, 2029, 2113, 2213, 2293, 2377, 2447, 2551, 2659, 2713, 2797, 2887, 2971, 3079, 3187, 3271, 3359, 3461, 3539

Offset: 1

Vincenzo Librandi, Sep 08 2014

Jens Kruse Andersen, Table of n, a(n) for n = 1..10000

Cf. sequences of the type prime(k*n): A000040 (k=1), A031215 (k=2), A031336 - A031343 (k=3..10), this sequence (k=11), A246930 (k=12), A126588 (k=13), A246931 (k=14), A246932 (k=15), A246933 (k=16), A129480 (k=17), A031921 (k=100), A031922 (k=1000).

Magma
```
[NthPrime(11*n): n in [1..50]];
```
Mathematica
```
Prime[11 Range[50]]
```

a(n)=prime(11*n) \\ Edward Jiang, Sep 08 2014

[nth_prime(11*n) for n in (1..50)] # Bruno Berselli, Sep 08 2014

A244064 Primes which are concatenation of prime(n), prime(10n) and prime(100n).

Original entry on oeis.org

4173310657, 97158322307, 137221330559, 223341346447, 251390752919, 271423157191, 367552173973, 433647386371, 487729796581, 491741197813, 5097643101281, 6018831116447, 6179109119983, 6439439124577, 70910343136379, 71910459137477, 82311933155327, 82912109157739

Offset: 1

K. D. Bajpai, Jun 19 2014

			4173310657 is in the sequence because concatenation of [prime(13), prime(130), prime(1300)] = 4173310657, which is a prime.
97158322307 is in the sequence because concatenation of [prime(25), prime(250), prime(2500)] = 97158322307, which is a prime.

K. D. Bajpai, Table of n, a(n) for n = 1..11139

Cf. A000040, A030469.

Cf. A031343 (prime(10n)), A031921 (prime(100n)).

with(numtheory): with(StringTools): A244064:= proc() local a,b,c,m; a:=ithprime(n); b:=ithprime(10*n); c:=ithprime(100*n);m:=parse(cat(a,b,c)); if isprime(m) then RETURN (m); fi; end: seq(A244064 (), n=1..300);

A244064 = {}; Do[t = FromDigits[Flatten[IntegerDigits /@ {Prime[n], Prime[10 n], Prime[100 n]}]]; If[PrimeQ[t], AppendTo[A244064, t]], {n, 300}]; A244064

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A118509 First differences of A031921.

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A246929 a(n) = prime(11*n).

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A244064 Primes which are concatenation of prime(n), prime(10n) and prime(100n).

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Maple

Mathematica