Number of subsets of the first n nonzero tetrahedral numbers whose sum is a nonzero tetrahedral number.

A378170

Number of subsets of the first n nonzero tetrahedral numbers whose sum is a nonzero tetrahedral number.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =8a(6) =11a(7) =13a(8) =19a(9) =34a(10) =45a(11) =72a(12) =113a(13) =171a(14) =262a(15) =388a(16) =638a(17) =1128a(18) =1928a(19) =3370a(20) =5584a(21) =9691a(22) =17129a(23) =30493a(24) =54785a(25) =94510a(26) =169817a(27) =308491a(28) =559176a(29) =1019487

External references