a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = floor( n/2 ), s = natural numbers >= 3.

A024875

a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = floor( n/2 ), s = natural numbers >= 3.

Terms

    a(0) =12a(1) =15a(2) =38a(3) =45a(4) =82a(5) =94a(6) =148a(7) =166a(8) =240a(9) =265a(10) =362a(11) =395a(12) =518a(13) =560a(14) =712a(15) =764a(16) =948a(17) =1011a(18) =1230a(19) =1305a(20) =1562a(21) =1650a(22) =1948a(23) =2050a(24) =2392a(25) =2509a(26) =2898a(27) =3031a(28) =3470a(29) =3620

External references