OFFSET
1,1
EXAMPLE
a(1) = 51 because 51 occurs at offset (51-3) after the decimal in the digits of Pi.
PROG
(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 ispal(s): return s == s[::-1]
def afind():
for k in range(len(pi_digits)):
sk = str(k)
if sk == pi_digits[k-3:k-3+len(sk)]:
print(k, end=", ")
afind() # Michael S. Branicky, Jan 30 2022
CROSSREFS
KEYWORD
base,more,nonn
AUTHOR
Gil Broussard, Dec 21 2008
EXTENSIONS
a(5)-a(8) from Michael S. Branicky, Jan 30 2022
STATUS
approved