a(n) = 7*A000330(n).

Terms

a(0) =0a(1) =7a(2) =35a(3) =98a(4) =210a(5) =385a(6) =637a(7) =980a(8) =1428a(9) =1995a(10) =2695a(11) =3542a(12) =4550a(13) =5733a(14) =7105a(15) =8680a(16) =10472a(17) =12495a(18) =14763a(19) =17290a(20) =20090a(21) =23177a(22) =26565a(23) =30268a(24) =34300a(25) =38675a(26) =43407a(27) =48510a(28) =53998a(29) =59885