A057748 Number of decompositions of 2n-1 into sum of a twin lucky number and a twin even-lucky-number (from A045955, A045956).

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

Offset: 1

Author

Naohiro Nomoto, Oct 30 2000

Keywords

• nonn
• easy

Comments

Conjecture: this sequence is always positive (with n>1).

Examples

			1 is not the sum of Twin lucky number and Twin 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..5000

Crossrefs

Cf. A000959, A057701, A045954, A045955, A045956.

Extensions

Offset changed to 1 by Jinyuan Wang, Apr 07 2020