This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A236437 Primes which occur in their proper place in A236174. 5
 2, 263, 269, 347, 397, 431, 461, 479, 499, 569, 599, 607, 677, 683, 719, 769, 797, 821, 929, 941, 1019, 1031, 1049, 1051, 1061, 1069, 1103, 1181, 1223, 1229, 1237, 1297, 1307, 1367, 1399, 1409, 1439, 1453, 1487, 1489, 1523, 1553, 1559, 1571, 1619, 1637, 1733, 1759, 1811, 1823, 1949, 1973, 1997 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes p such that A236174(k) = prime(k) for some k. The values of k are (essentially) given in A235377. Same as A052033 if the initial 2 is omitted. LINKS Chai Wah Wu, Table of n, a(n) for n = 1..10000 EXAMPLE 263 is the 56th prime and is also the 56th term in A236174. PROG (Python) from sympy import prime, isprime def A236174(n): ....p = prime(n) ....for b in range(2, 11): ........x, y, z = p, 0, 1 ........while x >= b: ............x, r = divmod(x, b) ............y += r*z ............z *= 10 ........y += x*z ........if isprime(y): ............return y A236437_list = [prime(n) for n in range(1, 10**6) if A236174(n) == prime(n)] # Chai Wah Wu, Jan 03 2015 CROSSREFS Cf. A052033, A236174, A235377, A235354. Sequence in context: A252708 A103029 A122862 * A137105 A216984 A007082 Adjacent sequences:  A236434 A236435 A236436 * A236438 A236439 A236440 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Jan 25 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 18 22:10 EDT 2019. Contains 321305 sequences. (Running on oeis4.)