Group successively larger composite numbers so that the sum of the n-th group is a multiple of n. Sequence gives the sum of the terms in the n-th group.

A074120

Group successively larger composite numbers so that the sum of the n-th group is a multiple of n. Sequence gives the sum of the terms in the n-th group.

Terms

    a(0) =4a(1) =6a(2) =27a(3) =12a(4) =45a(5) =18a(6) =63a(7) =24a(8) =270a(9) =330a(10) =198a(11) =780a(12) =2314a(13) =644a(14) =1800a(15) =3600a(16) =3808a(17) =3150a(18) =6479a(19) =3500a(20) =7140a(21) =2662a(22) =2438a(23) =936a(24) =5175a(25) =6526a(26) =1431a(27) =8596a(28) =12586a(29) =8730

External references