A272676 Smallest number greater than previous term such that a(n)^2 begins with n.

0, 1, 5, 6, 7, 23, 25, 27, 29, 30, 32, 34, 35, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 188, 190, 193, 195, 198, 200, 203, 205, 208

Offset

0,3

Links

Chai Wah Wu, Table of n, a(n) for n = 0..10000

Example

a(4) = 7 because 7^2 = 49 begins with 4. (Without the monotonic condition, we could have used 4 - this would give A018851.)

Crossrefs

Cf. A077502 (the squares), A018851, A018796.

Sequence in context: A048007 A273402 A217295 * A066876 A048042 A048090

Adjacent sequences: A272673 A272674 A272675 * A272677 A272678 A272679

Keyword

nonn,base

Author

Nathan Fox, Brooke Logan, and N. J. A. Sloane, May 21 2016

Status

approved