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 A244369 Palindromic right-angled primes. 3
 101, 787, 34543, 7654567, 345676543, 34567876543 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Intersection of A002113 and A167842. Intersection of A002385 and A135602. The last term of this sequence is also the last term of A134811. LINKS EXAMPLE Illustration of a(6) = 34567876543, the last term of this sequence: . . . . . . . . . . . . . . . . 8 . . . . . . . . . 7 . 7 . . . . . . . 6 . . . 6 . . . . . 5 . . . . . 5 . . . 4 . . . . . . . 4 . 3 . . . . . . . . . 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PROG (Python) from sympy import isprime A244369 = [] for n in range(1, 10): ....for m in range(n-1, -1, -1): ........l = ''.join([str(d) for d in range(n, m-1, -1)]) ........p = int(l+l[-2::-1]) ........if isprime(p): ............A244369.append(p) ....for m in range(n+1, 10): ........l = ''.join([str(d) for d in range(n, m+1)]) ........p = int(l+l[-2::-1]) ........if isprime(p): ............A244369.append(p) A244369 = sorted(A244369) # Chai Wah Wu, Aug 15 2014 CROSSREFS Cf. A000040, A002113, A002385, A134811, A135602, A167842. Sequence in context: A171813 A089291 A167842 * A200733 A267002 A242138 Adjacent sequences:  A244366 A244367 A244368 * A244370 A244371 A244372 KEYWORD nonn,base,fini,full AUTHOR Omar E. Pol, Jun 26 2014 STATUS approved

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Last modified October 1 17:45 EDT 2020. Contains 337444 sequences. (Running on oeis4.)