Number of subsets of {1,2,...,n-12} without differences equal to 2, 4, 6, 8, 10 or 12.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =1a(12) =1a(13) =2a(14) =4a(15) =6a(16) =9a(17) =12a(18) =16a(19) =20a(20) =25a(21) =30a(22) =36a(23) =42a(24) =49a(25) =56a(26) =64a(27) =80a(28) =100a(29) =130