A057747 Number of decompositions of 2n-1 into sum of a lucky number and an even-lucky-number (from A045954).

0, 1, 2, 2, 2, 3, 4, 3, 3, 5, 4, 4, 5, 6, 4, 4, 5, 7, 6, 5, 5, 8, 6, 6, 6, 8, 8, 9, 8, 8, 7, 6, 7, 8, 9, 9, 9, 9, 10, 10, 7, 10, 13, 8, 9, 11, 10, 8, 9, 10, 12, 10, 12, 9, 12, 11, 10, 12, 14, 12, 15, 12, 10, 12, 10, 13, 16, 11, 13, 16, 14, 11, 15, 15, 13, 17, 15, 12, 13, 10, 12, 18, 14, 11

Offset: 1

Author

Naohiro Nomoto, Oct 30 2000

Keywords

• nonn
• easy

Examples

			1 is not the sum of a lucky number and an even-lucky-number, so a(1)=0; 3=1+2 (one way, so a(2)=1); 5=3+2=1+4 (so a(3)=2); etc.
		

Links

• Jinyuan Wang, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000959, A045954.

Extensions

Offset changed to 1 by Jinyuan Wang, Apr 07 2020