A153224 Numbers k such that the string k is found at position k-5 in the decimal digits of Pi.

26, 32, 41, 86, 2799, 469113068

Offset: 1

Author

Gil Broussard, Dec 21 2008

Keywords

• base
• more
• nonn

Examples

			a(1) = 26 because 26 occurs at offset (26-5) after the decimal in the digits of Pi.
		

Crossrefs

Cf. A057679, A057680, A109513, A109514, A153221, A153223.

Programs

Python

from sympy import S
# download https://stuff.mit.edu/afs/sipb/contrib/pi/pi-billion.txt, then
#with open('pi-billion.txt', 'r') as f: pi_digits = f.readline()
pi_digits = str(S.Pi.n(3*10**5+2))[:-2] # alternative to above
pi_digits = pi_digits.replace(".", "")
def afind():
    for k in range(6, len(pi_digits)):
        sk = str(k)
        if sk == pi_digits[k-5:k-5+len(sk)]:
            print(k, end=", ")
afind() # Michael S. Branicky, Jan 30 2022

Extensions

a(6) from Michael S. Branicky, Jan 30 2022