A025640 Exponent of 3 (value of i) in n-th number of form 3^i*4^j.

0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 5, 0, 4, 3, 2, 6, 1, 5, 0, 4, 3, 7, 2, 6, 1, 5, 0, 4, 8, 3, 7, 2, 6, 1, 5, 0, 9, 4, 8, 3, 7, 2, 6, 1, 10, 5, 0, 9, 4, 8, 3, 7, 2, 11, 6, 1, 10, 5, 0, 9, 4, 8, 3, 12, 7, 2, 11, 6, 1, 10, 5, 0, 9, 4, 13, 8, 3, 12, 7, 2, 11, 6, 1, 10, 5, 0, 14, 9, 4, 13, 8, 3, 12, 7, 2, 11, 6

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Examples

			a(20) = 6 as the 20th number of the form 3^i * 4^j is 729 = 3^6 * 4^0 (See A025613). So the value of i in that factorization is the exponent of 3 which is 6. - _David A. Corneth_, Jan 28 2021
		

Links

• David A. Corneth, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A025613.