A137847 Smallest number missing in the EKG sequence (A064413) after n terms.

2, 3, 3, 3, 5, 5, 5, 5, 5, 7, 7, 7, 7, 11, 11, 11, 11, 11, 11, 13, 13, 13, 13, 13, 13, 13, 13, 17, 17, 17, 17, 17, 19, 19, 19, 19, 23, 23, 23, 23, 23, 23, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 31, 31, 31, 31, 37, 37, 37, 37, 37, 37, 41, 41, 41, 41, 41, 41, 41, 43

Offset: 1

Author

Zak Seidov, May 12 2008

Keywords

• nonn

Comments

Lengths of runs gives A064425 prefixed by a 2.

Examples

			a(1)=2 because the least integer absent in EKG with 1 term, {1}, is 2;
a(2..4)=3 because the least integer absent in EKG with 4 terms, {1,2,4,6}, is 3;
a(5..9)=5 because the least integer absent in EKG with 9 terms, {1,2,4,6,3,9,12,8,10}, is 5;
a(10..13)=7 because the least integer absent in EKG with 15 terms, {1,2,4,6,3,9,12,8,10}, is 7.
		

Links

• Index entries for sequences related to EKG sequence

Crossrefs

Cf. A064413, A064425.

Extensions

Entries checked by Jacques Tramu and Vladeta Jovovic.