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

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

Offset: 1

Author

Chai Wah Wu, Aug 15 2014

Keywords

• nonn
• base
• fini
• full

Examples

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

Crossrefs

Cf. A246135, A244369.

Programs

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)