Staircase path through the array P(n,k) of the k-th partial sums of cubes (A000578).

Terms

a(0) =1a(1) =9a(2) =10a(3) =46a(4) =57a(5) =203a(6) =272a(7) =846a(8) =1200a(9) =3432a(10) =5082a(11) =13728a(12) =21021a(13) =54483a(14) =85696a(15) =215254a(16) =346086a(17) =848198a(18) =1388900a(19) =3337236a(20) =5549786a(21) =13119614a(22) =22108704a(23) =51557260a(24) =87885070a(25) =202588830a(26) =348817770a(27) =796117860a(28) =1382941125a(29) =3129153795