a(n) = 2*a(n-1) - a(n-3) + 2*a(floor(n/2)) + 3*a(floor(n/3)) + ... + n*a(floor(n/n)), where a(0) = 1, a(1) = 1, a(2) = 1.
A298408
a(n) = 2*a(n-1) - a(n-3) + 2*a(floor(n/2)) + 3*a(floor(n/3)) + ... + n*a(floor(n/n)), where a(0) = 1, a(1) = 1, a(2) = 1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =6a(4) =20a(5) =53a(6) =130a(7) =277a(8) =574a(9) =1115a(10) =2126a(11) =3862a(12) =7021a(13) =12341a(14) =21553a(15) =36957a(16) =63111a(17) =106224a(18) =178407a(19) =296638a(20) =492231a(21) =811731a(22) =1335994a(23) =2188950a(24) =3583027a(25) =5847108a(26) =9532980a(27) =15512342a(28) =25226123a(29) =40967842
External references
- oeis: A298408