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 A246136 Numbers that are palindromic right angle numbers in base 8. 2
 211, 227, 373, 503, 32119, 856147, 2054519, 131479927 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..8. EXAMPLE 856147 is in the list since it is prime and is equal to 3210123 in base 8. PROG (Python) from sympy import isprime A246136 = [] for n in range(1, 8): ....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], 8) ........if isprime(p): ............A246136.append(p) ....for m in range(n+1, 8): ........l = ''.join([str(d) for d in range(n, m+1)]) ........p = int(l+l[-2::-1], 8) ........if isprime(p): ............A246136.append(p) A246136 = sorted(A246136) CROSSREFS Cf. A246135, A244369. Sequence in context: A133959 A133960 A031931 * A087833 A240918 A346948 Adjacent sequences: A246133 A246134 A246135 * A246137 A246138 A246139 KEYWORD nonn,base,fini,full AUTHOR Chai Wah Wu, Aug 15 2014 STATUS approved

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Last modified August 12 09:11 EDT 2024. Contains 375085 sequences. (Running on oeis4.)