Positive integers that cannot be written as a sum of a practical number and a heptagonal number.

Terms

a(0) =10a(1) =14a(2) =44a(3) =45a(4) =51a(5) =53a(6) =68a(7) =69a(8) =77a(9) =86a(10) =92a(11) =110a(12) =125a(13) =131a(14) =170a(15) =173a(16) =179a(17) =182a(18) =206a(19) =233a(20) =266a(21) =284a(22) =296a(23) =303a(24) =373a(25) =377a(26) =383a(27) =425a(28) =437a(29) =444