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A035073
a(n) is root of square starting with digit 6: first term of runs.
3
8, 25, 78, 245, 775, 2450, 7746, 24495, 77460, 244949, 774597, 2449490, 7745967, 24494898, 77459667, 244948975, 774596670, 2449489743, 7745966693, 24494897428, 77459666925, 244948974279, 774596669242, 2449489742784, 7745966692415, 24494897427832, 77459666924149
OFFSET
1,1
FORMULA
a(n) = ceiling(sqrt(6*10^n)), n > 0.
PROG
(Python)
from math import isqrt
def a(n): return isqrt(6*10**n) + 1
print([a(n) for n in range(1, 28)]) # Michael S. Branicky, Aug 25 2021
CROSSREFS
Subsequence of A045860.
Cf. A067576 (squares), A035076 (2..9).
Sequence in context: A127813 A295911 A231791 * A041120 A042637 A133661
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Nov 15 1998
STATUS
approved