Total number of parts that are the smallest part or the largest part in all partitions of n.

Terms

a(0) =1a(1) =3a(2) =6a(3) =12a(4) =20a(5) =34a(6) =52a(7) =80a(8) =116a(9) =170a(10) =236a(11) =333a(12) =453a(13) =621a(14) =825a(15) =1111a(16) =1455a(17) =1923a(18) =2487a(19) =3239a(20) =4149a(21) =5342a(22) =6770a(23) =8625a(24) =10852a(25) =13698a(26) =17107a(27) =21413a(28) =26567a(29) =33019