A244369 -id:A244369 - cp's OEIS frontend

A246135 Primes that are palindromic right angle numbers in base 9.

173, 191, 373, 719, 50767, 1270271, 30890747159

Offset: 1

Chai Wah Wu, Aug 15 2014

			50767 is in the list since it is prime and is equal to 76567 in base 9.

Cf. A246136, A244369.

from sympy import isprime
A246135 = []
for n in range(1,9):
    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], 9)
        if isprime(p):
            A246135.append(p)
    for m in range(n+1, 9):
        l = ''.join([str(d) for d in range(n, m+1)])
        p = int(l+l[-2::-1], 9)
        if isprime(p):
            A246135.append(p)
A246135 = sorted(A246135)

A246136 Numbers that are palindromic right angle numbers in base 8.

Original entry on oeis.org

211, 227, 373, 503, 32119, 856147, 2054519, 131479927

Offset: 1

Chai Wah Wu, Aug 15 2014

			856147 is in the list since it is prime and is equal to 3210123 in base 8.

Cf. A246135, A244369.

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)

cp's OEIS Frontend

A246135 Primes that are palindromic right angle numbers in base 9.

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A246136 Numbers that are palindromic right angle numbers in base 8.

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Python